Milestones:List of IEEE Milestones

Milestones, with their plaque citations, are listed below in chronological order of the achievement. When the dates of the milestone are a range and overlap, our convention is to list them by the start date of the work, e.g. 1961-1972 comes before 1962, which comes before 1962-1965, which comes before 1964, etc.

To make it easier for people to visit the sites of IEEE Milestones we have also made a page with addresses, maps, and satellite images.

Looking to submit a IEEE Milestone? Here are the Milestone Program Guidelines and submit a proposal here.

Prior to 1800

Book “Experiments and Observations on Electricity” by Benjamin Franklin, 1751: Philadelphia, Pennsylvania, U.S.A., Dedicated 7 August 2009 - IEEE Philadelphia Section

In April 1751 the Royal Society published Benjamin Franklin's book, "Experiments and Observations on Electricity: Made in Philadelphia in America." A collection of letters to London's Peter Collinson, it described Franklin's ideas about the nature of electricity and how electrical devices worked, and new experiments to investigate lightning. This book led to a better understanding of charges, stimulated Franklin's work on lightning rods, and made him an internationally known figure.

Benjamin Franklin's work in London, 1757-1775: London, England, Dedicated 31 March 2003 - IEEE United Kingdom and Ireland Section

Benjamin Franklin, American electrician, printer, and diplomat, spent many years on Craven Street. He lived at No. 7 between 1772 and 1775 and at No. 36 from 1757-1762 and again from 1764-1772. During these years, Franklin popularized the study of electricity, performed experiments, and served as an advisor on lightning conductors.

Elekiteru: First Electrostatic Generator in Japan, 1776: Kagawa, Japan, Dedicated 22 March 2025 - IEEE Shikoku Section

In 1776, a friction-induced electrostatic generator was first demonstrated in Japan by Gennai Hiraga after he spent six years repairing and restoring a broken device imported from the Netherlands. His improved design was later called the Elekiteru, and its widespread demonstration in Japan inspired the country's first generation of electricity researchers. Hiraga's Elekiterus have been displayed in Tokyo and in Kagawa Prefecture, respectively.

Volta's Electrical Battery Invention, 1799: Como, Italy, Dedicated 15 September 1999 - IEEE Italy Section

In 1799, Alessandro Volta developed the first electrical battery. This battery, known as the Voltaic Cell, consisted of two plates of different metals immersed in a chemical solution. Volta's development of the first continuous and reproducible source of electrical current was an important step in the study of electromagnetism and in the development of electrical equipment.

1800-1850

Salvá's Electric Telegraph, 1804: Barcelona, Spain, Dedicated 17 May 2019 - IEEE Spain Section

On 22 February 1804, Francisco Salvá Campillo reported to the Barcelona Royal Academy of Sciences, in Spain, a new kind of electric telegraph. He proposed a new method of telegraphy by combining the generation of an electric current using the recently-invented voltaic pile with detection by water electrolysis. Salvá’s report described the elements required and how they should be arranged to convey information at a distance.

The Birth of Electrodynamics, 1820-1827: Paris, Dedicated 3 April 2023 - IEEE France Section

Stimulated by experimental reports that an electric current could deflect a compass needle, André-Marie Ampère discovered the fundamental law of electrodynamics, the science of interactions between electric currents. He then developed the theory that electric currents are responsible for magnetism. These achievements formed the basis for electrical technologies, including electric motors and generators. In 1881, the International Electrical Congress named the unit of electric current the ‘ampere’ (A).

Shilling's Pioneering Contribution to Practical Telegraphy, 1828-1837: St. Petersburg, Russia, Dedicated 18 May 2009 - IEEE Russia (Northwest) Section

In this building, Shilling's original electromagnetic telegraph is exhibited. P. L. Shilling, a Russian scientist, successfully transmitted messages over different distances by means of an electric current's effect on a magnetic needle, using two signs and a telegraph dictionary for transferring letters and digits. Shilling's demonstrations in St. Petersburg and abroad provided an impetus to scientists in different countries and influenced the invention of more advanced electromagnetic telegraphs.

Callan's Pioneering Contributions to Electrical Science and Technology, 1836: Maynooth, Ireland, Dedicated 5 September 2006 - IEEE United Kingdom and Ireland Section

Reverend Nicholas Callan (1799 - 1864), professor of Natural Philosophy at Saint Patrick's College Maynooth, contributed significantly to the understanding of electrical induction and the development of the induction coil. He did this through a series of experiments that made the inductive transient phenomena visibly clear. The apparatus used in these experiments was replicated in other laboratories.

Demonstration of Practical Telegraphy, 1838: Morristown, NJ, U.S.A., Dedicated 7 May 1988 - IEEE North Jersey Section

In this building in January 1838, Samuel F. B. Morse and Alfred Vail first demonstrated publicly crucial elements of their telegraph system, using instruments that Vail had constructed during the previous months. Electrical pulses, transmitted through two miles of wire, caused an electromagnet to ink dots and dashes (grouped to represent letters and words) on a strip of paper. Commercialization began in 1844 when funding became available.

1850-1869

Electric Fire Alarm System, 1852: Boston, MA, U.S.A., Dedicated 1 October 2004 - IEEE Boston Section

On 28 April 1852 the first municipal electric fire alarm system using call boxes with automatic signaling to indicate the location of a fire was placed into operation in Boston. Invented by William Channing and Moses Farmer, this system was highly successful in reducing property loss and deaths due to fire and was subsequently adopted throughout the United States and in Canada.

Maxwell's Equations, 1860-1871: London, England, Glenlair, Scotland, Dedicated 13 August 2009 - IEEE United Kingdom and Ireland Section

Between 1860 and 1871, at his family home Glenlair and at King’s College London, where he was Professor of Natural Philosophy, James Clerk Maxwell conceived and developed his unified theory of electricity, magnetism and light. A cornerstone of classical physics, the Theory of Electromagnetism is summarized in four key equations that now bear his name. Maxwell’s equations today underpin all modern information and communication technologies.

First Studies on Ring Armature for Direct-Current Dynamos, 1860-1863: Pisa, Italy, Dedicated 4 December 2018 - IEEE Italy Section

A dynamo with a slotted ring armature, described and built at the University of Pisa by Antonio Pacinotti, was a significant step leading to practical electrical machines for direct current. Groups of turns of the closed winding were connected to the bars of a commutator. The machine worked as a motor also.

Transcontinental Telegraph, 1861: Fort Laramie, WY, U.S.A., Dedicated 5 August 1990 - IEEE Denver Section

Between July 4 and October 24, 1861, a telegraph line was constructed by the Western Union Company between St. Joseph, Missouri, and Sacramento, California, thereby completing the first high-speed communications link between the Atlantic and Pacific coasts. This service met the critical demand for fast communications between these two areas. The telegraph line operated until May 1869, when it was replaced by a multi-wire system constructed with the Union Pacific and Central Pacific railway lines.

Standardisation of the Ohm, 1861-1867: Glasgow, Scotland, Dedicated 17 September 2019 - IEEE United Kingdom and Ireland Section

The International Committee on Electrical Standards, with contributions by Fleeming Jenkin, James Clerk Maxwell, William Thomson, Werner von Siemens, and colleagues, advised the British Association for the Advancement of Science in providing a widely recognised standard for electrical resistance. This unit, subsequently named after Georg Simon Ohm, is the resistance of a conductor such that a constant current of one ampere produces a potential difference of one volt.

Landing of the Transatlantic Cable, 1866: Heart's Content, Newfoundland, Canada, Dedicated 15 June 1985 - IEEE Newfoundland-Labrador Section

A permanent electrical communications link between the old world and the new was initiated at this site with the landing of a transatlantic cable on July 27, 1866. This achievement altered for all time personal, commercial, and political relations between peoples on the two sides of the ocean. Five more cables between Heart's Content and Valentia, Ireland were completed between 1866 and 1894. This station continued in operation until 1965. IEEE Canada maintains a web site about this Milestone.

County Kerry Transatlantic Cable Stations, 1866: County Kerry, Ireland, Dedicated 13 July 2000 - IEEE United Kingdom and Ireland Section

On July 13, 1866 the Great Eastern steamed westward from Valentia, laying telegraph cable behind her. The successful landing at Heart's Content, Newfoundland on July 27 established a permanent electrical communications link that altered for all time personal, commercial and political relations between people across the Atlantic Ocean. Later, additional cables were laid from Valentia and new stations opened at Ballinskelligs (1874) and Waterville (1884), making County Kerry a major focal point for global communications.

1870-1889

First Intelligible Voice Transmission over Electric Wire, 1876: Boston, MA, U.S.A., Dedicated 10 March 2006 - IEEE Boston Section

The first transmission of intelligible speech over electrical wires took place on 10 March 1876. Inventor Alexander Graham Bell called out to his assistant Thomas Watson, "Mr. Watson, come here! I want to see you." This transmission took place in their attic laboratory located in a building near here at 5 Exeter Place.

Thomas Alva Edison Historic Site at Menlo Park, 1876: Menlo Park, NJ, U.S.A., Dedicated 9 September 2006 - IEEE Princeton/Central Jersey Section

Between 1876 and 1882 at Menlo Park, New Jersey, Thomas Edison developed the world's first industrial research and development laboratory devoted to developing new technology. At this laboratory. Edison and his staff developed the first system of incandescent electric lighting and electric power generation, and invented recorded sound and a commercially successful telephone transmitter.

First Distant Speech Transmission in Canada, 1876: Paris, Ontario, Canada, Dedicated 4 May 2008 - IEEE Hamilton Section

On 10 August 1876, Alexander Graham Bell demonstrated on this site that the human voice could be transmitted electrically over distance. While family members spoke into a transmitter in Brantford, 13 km away, Bell was able to hear them at a receiver located here. This test convinced Bell that his invention could be used for communications between towns and could compete successfully with the telegraph.

Vulcan Street Plant, 1882: Appleton, WI, U.S.A., Dedicated 15 September 1977 - IEEE Northeastern Wisconsin Section

Near this site on September 30, 1882, the world's first hydroelectric central station began operation. The station, here reproduced, was known as the Vulcan Street Plant and had a direct current generator capable of lighting 250 sixteen candle power lamps each equivalent to 50 watts. The generator operated at 110 volts and was driven through gears and belts by a water wheel operating under a ten foot fall of water.

First Central Station in South Carolina, 1882: Charleston, SC, U.S.A., Dedicated 24 July 1986 - IEEE Coastal South Carolina Section

The United States Electric Illuminating Company started up South Carolina's first central station for incandescent electric lighting in this building in October 1882. This was just one month after Thomas Edison opened his central station on New York City's Pearl Street. In the following years, the pioneering firm of United States Electric was one of Edison's main competitors.

Pearl Street Station, 1882: New York City, NY, U.S.A., Dedicated 10 May 2011 - IEEE New York Section

Thomas Alva Edison established the Edison Electric Illuminating Company of New York, now Consolidated Edison, to commercialize his 1879 incandescent lamp invention. On 4 September 1882, Edison’s direct current (dc) generating station at 257 Pearl Street, began supplying electricity to customers in the First District, a one-quarter square mile (0.65 square km) area. This installation was the forerunner of all central electric generating stations.

First Technical Meeting of the American Institute of Electrical Engineers, 1884: Philadelphia, PA, U.S.A., Dedicated 15 December 2013 - IEEE Philadelphia Section

As part of the landmark International Electrical Exhibition organized by the Franklin Institute and held in Philadelphia, Pennsylvania, in 1884, the American Institute of Electrical Engineers, a predecessor of IEEE, held its first conference on 7-8 October 1884. This meeting was the first formal technical conference on electrical engineering held in the United States.

Rotating Fields and Early Induction Motors, 1885-1888: Torino, Italy, Dedicated 21 January 2021 - IEEE Italy Section

Galileo Ferraris, professor at the Italian Industrial Museum (now Polytechnic) of Turin, conceived and demonstrated the principle of the rotating magnetic field. Ferraris' field, produced by two stationary coils with perpendicular axes, was driven by alternating currents phase-shifted by 90 degrees. Ferraris also constructed prototypes of two-phase AC motors. Rotating fields, polyphase currents, and their application to induction motors had a fundamental role in the electrification of the world.

Alternating Current Electrification, 1886: Great Barrington, MA, U.S.A., Dedicated 2 October 2004 - IEEE Berkshire Section

On 20 March 1886 William Stanley provided alternating current electrification to offices and stores on Main Street in Great Barrington, Massachusetts. He thus demonstrated the first practical system for providing electrical illumination using alternating current with transformers to adjust voltage levels of the distribution system.

First Generation and Experimental Proof of Electromagnetic Waves, 1886-1888: Karlsruhe, Germany, Dedicated 5 December 2014 - IEEE Germany Section

In this building, Heinrich Hertz first verified Maxwell's equations and prediction of electromagnetic waves in 1886-1888. He observed the reflection, refraction and polarization of the waves and, moreover, the equality of their velocity of propagation with the velocity of light. His 450 MHz transmitter and receiver demonstrated the fundamentals of high-frequency technology.

Electric Lighting Of The Kingdom of Hawaii 1886-1888: Honolulu, HI, Dedicated 23 March 2018 - IEEE Hawaii Section

In November 1886, electric lights illuminated Iolani Palace's grounds for King Kalakaua's 50th birthday celebrations. By March 1887, the Palace had 325 incandescent lights installed within its 104 rooms. The king's action promoted economic development and accelerated implementation of electric lighting of the town of Honolulu on 23 March 1888.

Thomas A. Edison West Orange Laboratories and Factories, 1887: West Orange, NJ, Dedicated 18 October 2008 - IEEE North Jersey Section

Thomas Alva Edison, a West Orange resident from 1886 until his death in 1931, established his final and most comprehensive laboratory and factory complex about one-half mile (0.8 km) north of here in 1887. Edison's visionary combination in one organization of basic and applied research, development, and manufacturing became the prototype for industrial enterprises worldwide. Work here resulted in more than half of Edison's 1,093 patents.

Weston Meters, 1887-1893: Newark, NJ, Dedicated 23 September 2016 - IEEE North Jersey Section

Edward Weston and the Weston Electrical Instrument Company introduced the first portable and direct-reading current and voltage meters in 1888-1893. Weston's inventions enabling these meters included: the first truly permanent magnets; temperature-insensitive conductors; low-resistance and non-magnetic springs; metal coil frames where induced eddy currents provided pointer damping (1887); the electric shunt (1893) for the measurement of large currents; and multiple current ranges in a single meter.

Richmond Union Passenger Railway, 1888: Richmond, VA, U.S.A., Dedicated 2 February 1992 - IEEE Richmond Section

In February 1888, the electric street railway system designed by Frank Julian Sprague for the Richmond Union Passenger Railway began operating in Richmond, Virginia. Sprague's Richmond system became the lasting prototype for electric street railways because of its large-scale practicality and operating superiority. This system, which combined Sprague's engineering innovations with other proven technical features, helped shape urban growth worldwide.

Power System of Boston's Rapid Transit, 1889: Boston, MA, Dedicated 10 November 2004 - IEEE Boston Section

Boston was the first city to build electric traction for a large-scale rapid transit system. The engineering challenge to design and construct safe, economically viable, and reliable electric power for Boston's rapid transit was met by the West End Street Railway Company, beginning in 1889. The company's pioneering efforts provided an important impetus to the adoption of mass transit systems nationwide.

First Exploration and Proof of Liquid Crystals, 1889: Karlsruhe, Germany, Dedicated 11 October 2017 - IEEE Germany Section

The first liquid crystal materials were characterized in 1889 by Otto Lehmann in this building. Lehmann recognized the existence of a new state of matter, “flüssige Kristalle” or liquid crystals, which flows like a liquid but has the optical property of double refraction characteristic of crystals. Lehmann’s work on these compounds opened the door to further liquid crystal research and eventually displays and other applications.

1890-1899

Discovery of Radioconduction by Edouard Branly, 1890: Paris, France, Dedicated 23 September 2010 - IEEE France Section

In this building, Edouard Branly discovered radioconduction, now called the Branly Effect. On 24 November 1890, he observed that an electromagnetic wave changes the ability of metal filings to conduct electricity. Branly used his discovery to make a very sensitive detector called a coherer, improved versions of which became the first practical wireless signal receivers.

Keage Power Station: The Japan’s First Commercial Hydroelectric Plant, 1890-1897: Kyoto, Dedicated 11 September 2016 - IEEE Kansai Section

Keage Power Station achieved Japan’s first commercial hydroelectric generation using water intake from the Lake Biwa Canal. Construction of the station began in 1890, and was completed in 1897 with a total capacity of 1,760 kW, pioneering the start-up of power generation. A second canal revitalized the station in 1936 with a capacity of 5,700 kW, contributing to Japan’s technological modernization.

Ames Hydroelectric Generating Plant, 1891: Ames, CO, U.S.A., Dedicated 1 July 1988 - IEEE Pikes Peak Section

Electricity produced here in the spring of 1891 was transmitted 2.6 miles over rugged and at times inaccessible terrain to provide power for operating the motor-driven mill at the Gold King Mine. This pioneering demonstration of the practical value of transmitting electrical power was a significant precedent in the United States for much larger plants at Niagara Falls (in 1895) and elsewhere. Electricity at Ames was generated at 3000 volts, 133 Hertz, single-phase AC, by a 100-hp Westinghouse alternator.

Mill Creek No. 1 Hydroelectric Plant, 1893: Redlands, CA, U.S.A., Dedicated 20 February 1977 - IEEE Foothill Section

Built by the Redlands Electric Light and Power Company, the Mill Creek hydroelectric generating plant began operating on 7 September 1893. This powerhouse was foremost in the use of three-phase alternating current power for commercial application and was influential in the widespread adoption of three-phase power throughout the United States.

Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893: Japan, Dedicated 12 April 2014 - IEEE Kansai Section

Yai Dry Battery Limited Partnership Company received a patent for Yai's battery invention in 1893, giving birth to the Japanese dry battery industry, and contributing to its growth. Following this success, GS Yuasa Corporation and Panasonic Corporation pioneered a huge market of both primary and secondary batteries installed in industrial equipment and in home appliances. It advanced Japanese battery industries and consumer electronics.

First Millimeter-wave Communication Experiments by J.C. Bose, 1894-96: Kolkata, India, Dedicated 15 September 2012 - IEEE Kolkata Section

Sir Jagadish Chandra Bose, in 1895, first demonstrated at Presidency College, Calcutta, India, transmission and reception of electromagnetic waves at 60 GHz, over a distance of 23 meters, through two intervening walls by remotely ringing a bell and detonating gunpowder. For his communication system, Bose developed entire millimeter-wave components such as: a spark transmitter, coherer, dielectric lens, polarizer, horn antenna and cylindrical diffraction grating.

Adams Hydroelectric Generating Plant, 1895: Niagara Falls, NY, Dedicated 21 June 1990 - IEEE Buffalo Section

When the Adams Plant went into operation on August 26, 1895, it represented a key victory for alternating-current systems over direct-current. The clear advantage of high voltage AC for long distance power transmission and the unprecedented size of the plant (it reached its full capacity of ten 5,000-HP generators in May 1900) influenced the future of the electrical industry worldwide.

Popov's Contribution to the Development of Wireless Communication, 1895: St. Petersburg, Russia, Dedicated 20 May 2005 - IEEE Russia (Northwest) Section

On 7 May 1895, A. S. Popov demonstrated the possibility of transmitting and receiving short, continuous signals over a distance up to 64 meters by means of electromagnetic waves with the help of a special portable device responding to electrical oscillation which was a significant contribution to the development of wireless communication.

Marconi's Early Experiments in Wireless Telegraphy, 1895: Pontecchio Marconi, Italy, Dedicated 29 April 2011 - IEEE Italy Section

In this garden, after the experiments carried out between 1894 and 1895 in the “Silkworm Room” in the attic of Villa Griffone, Guglielmo Marconi connected a grounded antenna to its transmitter. With this apparatus the young inventor was able to transmit radiotelegraphic signals beyond a physical obstacle, the Celestini hill, at a distance of about two kilometres. The experiment heralded the birth of the era of wireless communication.On this hill, during the summer of 1895, the radiotelegraphic signals sent by Guglielmo Marconi from the garden of Villa Griffone were received. The reception was communicated to Marconi with a gunshot. This event marked the beginning of the new era of wireless communication

Mainline Electrification of the Baltimore and Ohio Railroad, 1895: Baltimore MD, U.S.A., Dedicated 21 June 2012 - IEEE Baltimore Section

On 27 June 1895, at the nearby Howard Street Tunnel, the B&O demonstrated the first electrified main line railroad, and commercial operation began four days later. The electrification involved designing, engineering, and constructing electric locomotives far more powerful than any then existing and creating innovative electric power generation and distribution facilities. This pioneering achievement became a prototype for later main line railroad electrification.

Krka-Šibenik Electric Power System, 1895: Krka-Sibenik, Croatia, Dedicated 5 July 2013 - IEEE Croatia Section

On 28 August 1895 electricity generated at this location was transmitted to the city of Šibenik, where six power transformers supplied a large number of street lamps. This early system of power generation, transmission and distribution was one of the first complete multiphase alternating current systems in the world and it remained in operation until World War I.

Folsom Powerhouse, 1895: Folsom, CA, Dedicated 13 July 2021 - IEEE Sacramento Valley Section

Folsom was one of the earliest electrical plants to generate three-phase alternating current, and the first using three-phase 60 hertz. On 13 July 1895, General Electric generators began transmitting electricity 22 miles to Sacramento at 11000 volts, powering businesses, streetcars, and California's capitol. The plant demonstrated advantages of three-phase, 60 hertz long-distance transmission, which became standard, and promoted nationwide development of affordable hydropower.

Budapest Metroline No.1., 1896: Budapest, Hungary, Dedicated 20 October 2022 - IEEE Hungary Section

In 1896, Budapest Metro Line No. 1 was inaugurated, the first underground railway designed specifically to use electric power, rather than adapted from steam-powered systems. It offered several innovative elements, including bidirectional motor carriages, the “goose neck chassis,” and electric lighting in the stations and carriages. This line's design influenced later subway construction in Boston, Paris, Berlin, and other metropolitan areas worldwide.

Chivilingo Hydroelectric Plant, 1897: Lota, Chile, Dedicated 24 October 2001 - IEEE Chile Section

The 1897 430 kW Chivilingo Plant was the first hydroelectric plant in Chile and the second in South America. A 10 km line fed the Lota coal mines and the railway extracting minerals 12 km from shore under the sea. It represented a new key technology and a new source of electrical energy in the region as a tool for economic development. Chivilingo demonstrated the advantages of industrial use of electricity and hastened its widespread adoption in Chile.

Decew Falls Hydro-Electric Plant, 1898: Decew Falls, Ontario, Dedicated 2 May 2004 - IEEE Hamilton Section

The Decew Falls Hydro-Electric Development was a pioneering project in the generation and transmission of electrical energy at higher voltages and at greater distances in Canada. On 25 August 1898 this station transmitted power at 22,500 Volts, 66 2/3 Hz, two-phase, a distance of 56 km to Hamilton, Ontario. Using the higher voltage permitted efficient transmission over that distance.

Rheinfelden Hydroelectric Power Plant, 1898 - 2010: Rheinfelden, Germany, Dedicated 25 September 2014 - IEEE Germany Section

The original Rheinfelden plant was an outstanding achievement in Europe's early large-scale generation of hydroelectric power. It was important for its 17,000 horsepower (12,500 kilowatt) output, for pioneering three-phase alternating current later adopted around the world, and using 50-Hertz frequency which afterwards became standard in most countries. Gradually, Rheinfelden entered into joint operation with other stations, from which the interconnected network of continental Europe evolved.

French Transatlantic Telegraph Cable of 1898: Orleans, MA, Dedicated 6 September 2018 - IEEE France, Providence Section

The submarine telegraph cable known as Le Direct provided communication between Europe and North America without intermediate relaying. In a remarkable feat of oceanic engineering, the cable was laid in the deepest waters of the Atlantic Ocean between Brest, France, and Orleans, Massachusetts. When completed in 1898 by La Compagnie Francaise des Cables Telegraphiques, it spanned 3174 nautical miles (5878 km), making it the longest and heaviest cable in service.v

First Operational Use Of Wireless Telegraphy, 1899-1902: Capetown, South Africa, Dedicated 29 September 1999 - IEEE South Africa Section

The first use of wireless telegraphy in the field occurred during the Anglo-Boer War (1899-1902). The British Army experimented with Marconi's system and the British Navy successfully used it for communication among naval vessels in Delagoa Bay, prompting further development of Marconi's wireless telegraph system for practical uses.

Calcutta Electric Supply Corp, 1899: Kolkata, Dedicated 18 December 2021 - IEEE Kolkata Section

The Calcutta Electric Supply Corporation (CESC) established the first commercial electric supply company in South Asia. CESC switched on the 1000 kW thermal power generation plant at Emambagh Lane, Prinsep Street in Calcutta (now Kolkata) on 17 April 1899. This delivered 450/225V DC power for street lighting, residential and office buildings, and the Calcutta Tramways. The event heralded the era of electricity in the Indian Subcontinent.

1900-1919

Georgetown Steam Hydro Generating Plant, 1900: Georgetown, CO, Dedicated 31 July 1999 - IEEE Denver Section

Electric generating plants, through their high-voltage lines, provided critical power to the isolated mines in this region. Georgetown, completed in 1900, was unusual in employing both steam and water power. Its owner, United Light and Power Company, was a pioneer in using three-phase, 60-Hertz alternating current and in being interconnected with other utilities.

Reception of Transatlantic Radio Signals, 1901: Signal Hill, Newfoundland, Canada, Dedicated 4 October 1985 - IEEE Newfoundland-Labrador Section

At Signal Hill on December 12, 1901, Guglielmo Marconi and his assistant, George Kemp, confirmed the reception of the first transatlantic radio signals. With a telephone receiver and a wire antenna kept aloft by a kite, they heard Morse code for the letter "S" transmitted from Poldhu, Cornwall. Their experiments showed that radio signals extended far beyond the horizon, giving radio a new global dimension for communication in the twentieth century.

Transmission of Transatlantic Radio Signals, 1901: Poldhu, Cornwall, England, Dedicated 12 December 2001 - IEEE United Kingdom and Ireland Section

On December 12, 1901, a radio transmission of the Morse code letter 'S' was broadcast from this site, using equipment built by John Ambrose Fleming. At Signal Hill in Newfoundland, Guglielmo Marconi, using a wire antenna kept aloft by a kite, confirmed the reception of these first transatlantic radio signals. These experiments showed that radio signals could propagate far beyond the horizon, giving radio a new global dimension for communications in the twentieth century.

Early Developments in Remote-Control, 1901: Madrid, Spain, Dedicated 15 March 2007 - IEEE Spain Section

In 1901, the Spanish engineer, Leonardo Torres-Quevedo began the development of a system, which he called Telekine, which was able to do "mechanical movements at a distance." The system was a way of testing dirigible balloons of his own creation without risking human lives. In 1902 and 1903 he requested some patents for the system. With the Telekine, Torres-Quevedo laid down modern wireless remote-control operation principles.

Rationalization of Units, 1901-1902: Italy, Dedicated 15 December 2021 - IEEE Italy Section

Giovanni Giorgi proposed rationalizing the equations of electromagnetism. His proposal added an electrical unit to the three mechanical units of measurement (meter, kilogram, second). While he was a professor at the University of Rome, the International Electrotechnical Commission adopted a version of Giorgi’s system. His ideas formed the basis of the universally adopted International System (SI) of units, currently used in all fields of science and engineering.

String Galvanometer, 1901-1905: Leiden, The Netherlands, Dedicated 8 April 2022 - IEEE Benelux Section

On 22 March 1905, the first successful clinical recording of a human electrocardiogram (ECG) took place at this location, which at the time was the Academic Hospital Leiden. Willem Einthoven’s pioneering work, from 1901 to 1905, resulted in a string galvanometer specifically designed to measure and record the heart’s electrical activity, which made this medical achievement possible. This invention marked the beginning of electrocardiography as a major clinical diagnostic tool.

Poulsen-Arc Radio Transmitter, 1902: Lyngby, Denmark, Dedicated 1 May 1994 - IEEE Denmark Section

Valdemar Poulsen, a Danish engineer, invented an arc converter as a generator of continuous-wave radio signals in 1902. Beginning in 1904, Poulsen used the arc for experimental radio transmission from Lyngby to various receiving sites in Denmark and Great Britain. Poulsen-arc transmitters were used internationally until they were superseded by vacuum-tube transmitters.

Vucje Hydroelectric Plant, 1903: Leskovac, Serbia, Dedicated 25 June 2005 - IEEE Serbia and Montenegro Section

The Vucje hydroelectric plant began operation in 1903. It was the first in southern Serbia and the largest in the broader region. By transmitting alternating electric current of 50 Hz at 7000 volts -- high for the period -- over a distance of 16 km , it helped to transform the regional economy. It remained in continual use for more than a century.

Alexanderson Radio Alternator, 1904: Schenectady, NY, U.S.A., Dedicated 20 February 1992 - IEEE Schenectady Section

The Alexanderson radio alternator was a high-power, radio-frequency source which provided reliable transoceanic radiotelegraph communication during and after World War I. Ernst F.W. Alexanderson (1878-1975), a General Electric engineer, designed radio alternators with a frequency range to 100 kHz and a power capability from 2 kW to 200 kW. These machines, developed during the period 1904 to 1918, were used in research on high-frequency properties of materials as well as for international communications.

Fleming Valve, 1904: London, England, Dedicated 1 July 2004 - IEEE United Kingdom and Ireland Section

Beginning in the 1880s Professor John Ambrose Fleming of University College London investigated the Edison effect, electrical conduction within a glass bulb from an incandescent filament to a metal plate. In 1904 he constructed such a bulb and used it to rectify high frequency oscillations and thus detect wireless signals. The same year Fleming patented the device, later known as the ‘Fleming valve.'

Radar Predecessor, 1904: Cologne, Germany, Dedicated 19 October 2019 - IEEE Germany Section

On 17 May 1904, near this site, Christian Hülsmeyer demonstrated his Telemobiloskop: a spark gap transmitter, simple parabolic antennas, detector, and an indicator. It was designed to ring a bell when a barge passed the system at a range of several hundred meters. He patented this device in Germany, the United Kingdom, and the U.S.A. This was the world's first operable device to detect radio reflections, a predecessor of radar.

Pinawa Hydroelectric Power Project, 1906: Nelson River, Canada, Dedicated 6 June 2008 - IEEE Winnipeg Section

On 9 June 1906 the Winnipeg Electric Railway Co. transmitted electric power from the Pinawa generating station on the Winnipeg River to the city of Winnipeg at 60,000 volts. It was the first year-round hydroelectric plant in Manitoba and one of the first to be developed in such a cold climate anywhere in the world.

First Wireless Radio Broadcast by Reginald A. Fessenden, 1906: Brant Rock, MA, U.S.A., Dedicated 13 September 2008 - IEEE Boston Section

On 24 December 1906, the first radio broadcast for entertainment and music was transmitted from Brant Rock, Massachusetts to the general public. This pioneering broadcast was achieved after years of development work by Reginald Aubrey Fessenden (1866-1932) who built a complete system of wireless transmission and reception using amplitude modulation (AM) of continuous electromagnetic waves. This technology was a revolutionary departure from transmission of dots and dashes widespread at the time.

Grand Central Terminal Electrification, 1906-1913: New York, NY, Dedicated 15 June 2016 - IEEE New York Section

Grand Central Terminal, in continuous use since 1913, was the first large-scale railroad electrification project, a development that enabled it to become a major railroad terminal. The design of the Terminal included several notable achievements in the field of electric traction such as innovative designs of electric locomotives, multiple unit (MU) control of electric rolling stock and the pioneering use of underrunning third rail.

Alternating-Current Electrification of the New York, New Haven & Hartford Railroad, 1907: Cos Cob, CT, U.S.A., Dedicated 22 May 1982 - IEEE Connecticut Section

This was a pioneering venture in mainline railroad electrification. It established single-phase alternating current as a technical and economical alternative to direct current. This concept exerted considerable influence over subsequent systems both in the United States and abroad. The major components of the system were developed by the engineering staffs of the New York, New Haven & Hartford Railroad and the Westinghouse Electric and Manufacturing Company of East Pittsburgh, Pennsylvania.

Shoshone Transmission Line, 1909: Georgetown, CO, U.S.A., Dedicated 22 June 1991 - IEEE Denver Section

July 17, 1909, the Shoshone Transmission Line began service carrying power, generated by the Shoshone Hydroelectric Generating Station, to Denver. The Line operated at 90 kV, was 153.4 miles long, and crossed the Continental Divide three times reaching an altitude of 13,500 feet. Its design and construction represented an outstanding electrical engineering accomplishment due to its length, the mountainous country over which it was constructed, and the unusually severe weather conditions under which it operated.

World's First Reliable High Voltage Power Fuse, 1909: Chicago, IL, U.S.A., Dedicated 3 August 2012 - IEEE Chicago Section

Reliable High-Voltage Power Fuse, 1909In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse which used an arc-extinguishing liquid to assure proper interruption of short circuits. These fuses, later manufactured at this location, played a major role in the adoption of outdoor distribution substations, and the technology remains a central component of electrical transmission and distribution systems today.

Discovery of Superconductivity, 1911: Leiden, The Netherlands, Dedicated 8 April 2011 - IEEE Benelux Section

On 8 April 1911, in this building, Professor Heike Kamerlingh Onnes and his collaborators, Cornelis Dorsman, Gerrit Jan Flim, and Gilles Holst, discovered superconductivity. They observed that the resistance of mercury approached "practically zero" as its temperature was lowered to 3 kelvins. Today, superconductivity makes many electrical technologies possible, including Magnetic Resonance Imaging (MRI) and high-energy particle accelerators.

Panama Canal Electrical and Control Installations, 1914: Balboa, Panama, Dedicated 4 April 2003 - IEEE Panama Section

The Panama Canal project included one of the largest and most important electrical installations in the world early in the 20th century. The use of 1022 electric motors with an installed capacity of 28,290 horsepower largely replaced the steam and water powered equipment then in common use. Reliability and safety were also engineered into the innovative electrical control system, enabling remote lock operation from a central location.

Invention of Sonar, 1915-1918: Paris, France, Dedicated 7 December 2023 - IEEE France Section

From 1915 to 1918, Paul Langevin demonstrated the feasibility of using piezoelectric quartz crystals to both transmit and receive pulses of ultrasound and thereby detect submerged submarines at ranges up to 1300 metres. The system, later called sonar, validated Constantin Chilowsky's proposal to use ultrasound for this purpose. The technology was used successfully during World War II, and led to other applications including depth sounding and medical echography.

Czochralski Process, 1916: Warszawa, Poland, Berlin, Germany, Dedicated 14 November 2019 - IEEE Germany, Poland Section

In 1916, Jan Czochralski invented a method of crystal growth used to obtain single crystals of semiconductors, metals, salts and synthetic gemstones during his work at AEG in Berlin, Germany. He developed the process further at the Warsaw University of Technology, Poland. The Czochralski process enabled development of electronic semiconductor devices and modern electronics.

1920-1929

Westinghouse Radio Station KDKA, 1920: Pittsburgh, PA, U.S.A., Dedicated 1 June 1994 - IEEE Pittsburgh Section

Westinghouse Radio Station KDKA was a world pioneer of commercial radio broadcasting. Transmitting with a power of 100 watts on a wavelength of 360 meters, KDKA began scheduled programming with the Harding-Cox Presidential election returns on November 2, 1920. A shed, housing studio and transmitter, was atop the K Building of the Westinghouse East Pittsburgh works. Conceived by C.P. Davis, broadcasting as a public service evolved from Frank Conrad's weekly experimental broadcasts over his amateur radio station 8XK, attracting many regular listeners who had wireless receiving sets.

Germany’s First Broadcast Transmission from the Radio Station Königs Wusterhausen, 1920: Germany, Dedicated 16 July 2016 - IEEE Germany Section

In early 1920, in this building, technicians of the Königs Wusterhausen radio station together with employees from the Telegraphentechnisches Reichsamt, began experiments broadcasting voice and music using an arc transmitter. By late 1920, tests had become successful enough to transmit an instrumental concert on 22 December -- the so-called Christmas concert. This transmission is regarded as the birth of statutorily regulated broadcasting in Germany.

Piezoelectric Oscillator, 1921-1923: Middletown, CT, Dedicated 5 November 2020 - IEEE Connecticut Section

In 1921, research at Wesleyan led to development of the first circuit to control frequencies based on a quartz crystal resonator. This technique was later applied in standards of frequency as a filter and for coupling between circuits. Piezoelectric quartz oscillators advanced ultrasonics, sonar, radar, and myriads of other electronic applications. They appeared in everyday life through their use in quartz wristwatches.

RCA Central, 1921: Rocky Point, NY, Dedicated 5 November 2021 - IEEE Long Island Section

On 5 November 1921, the world’s most powerful transoceanic radio facility at the time, RCA Radio Central, was inaugurated. Located at Rocky Point and Riverhead, New York, its Alexanderson 220 kW, 18.3 kHz transmitters and Beverage long-wire receiving antennas provided reliable worldwide radio communications. In succeeding years, RCA's research laboratory also developed diversity radio reception, rhombic and folded-dipole antennas, the first transoceanic single side-band channels, and commercial facsimile service.

Neutrodyne Circuit, 1922: Hoboken, NJ, Dedicated 19 October 2024 - IEEE North Jersey Section

The Neutrodyne Circuit, invented near this site in 1922, used neutralizing capacitors to eliminate squeals from parasitic oscillation that plagued early radios. Improved clarity of reception and easier tuning facilitated broader radio adoption by the general public. Multiple manufacturers licensed the circuit to make affordable consumer products, expanding the marketplace from amateur radio operators into a mass consumer market for news, information, music, and culture.

Directive Short Wave Antenna, 1924: Miyagi, Japan, Dedicated 17 June 1995 - IEEE Sendai Section

In these laboratories, beginning in 1924, Professor Hidetsugu Yagi and his assistant, Shintaro Uda, designed and constructed a sensitive and highly-directional antenna using closely-coupled parasitic elements. The antenna, which is effective in the higher-frequency ranges, has been important for radar, television, and amateur radio.

Development of Electronic Television, 1924-1941: Hamamatsu, Japan, Dedicated 12 November 2009 - IEEE Nagoya Section

Professor Kenjiro Takayanagi started his research program in television at Hamamatsu Technical College (now Shizuoka University) in 1924. He transmitted an image of the Japanese character イ(i) on a cathode-ray tube on 25 December 1926 and broadcast video over an electronic television system in 1935. His work, patents, articles, and teaching helped lay the foundation for the rise of Japanese television and related industries to global leadership.

Enrico Fermi's Major Contribution to Semiconductor Statistics, 1924-1926: Florence, Italy, Dedicated 5 December 2015 - IEEE Italy Section

Nobel laureate Enrico Fermi developed the quantum statistics that would be named after him while teaching at the School of Engineering of the University of Florence. The Fermi-Dirac statistics were a fundamental contribution to semiconductor physics and to the development of electronics.

Bell Telephone Laboratories, Inc., 1925-1983: Murray Hill, NJ, U.S.A., Dedicated 18 December 2014 - IEEE North Jersey Section

BELL LABS – WIRELESS AND SATELLITE COMMUNICATIONS, 1925-1983Bell Telephone Laboratories, Inc. introduced: the first radio astronomical observations (1933), Smith Chart (1939), early mobile phone service (1946), cellular wireless concept (1947), TDX Microwave Radio System (1947), TD Transcontinental Microwave Radio System (1950), Telstar - first active communications satellite (1962), first observation of the cosmic background radiation (1964), first U.S. cellular wireless system (1978), digital cellular technology (1980), and the AR6A SSB-SC Microwave System (1981).BELL LABS - DIGITAL SIGNAL PROCESSING AND COMPUTING, 1925-1983 Bell Telephone Laboratories, Inc. introduced: the first electronic speech synthesizer (1936), first binary digital computer (1939), first long-distance computing (1940), digitized and synthesized music (1957), digital computer art (1962), text-to-speech synthesis (1962), UNIX operating system (1969), the C and S languages (1972, 1976), first single-chip digital signal processor (1979), single-chip 32-bit microprocessor (1980), 5ESS Digital Switching System (1982), and C++ language (1983).BELL LABS - SOLID STATE AND OPTICAL DEVICES, 1925-1983 Bell Telephone Laboratories, Inc. introduced: the point-contact and junction transistors (1947, 1948), zone refining (1951), silicon epitaxy (1951), ion implantation (1952), solar cell (1954), oxide masking (1955), laser concept (1958), MOSFET (1959), foil electret microphone (1962), CO2 laser (1964), silicon gate (1966), heterostructure semiconductor laser (1968), charge coupled device (1969), theory of disordered states of matter (1977), heterojunction phototransistor (1980), and VLSI CMOS technology and circuits (1981).BELL LABS - COMMUNICATIONS THEORY AND NETWORKS, 1925-1983 Bell Telephone Laboratories, Inc. introduced: type A facsimile service (1925), first long-distance television transmission (1927), negative feedback amplifier (1927), first stereo sound transmission (1933), Hamming error-correcting codes (1948), information theory (1948), direct distance dialing (1951), TAT-1 transatlantic telephone cable (1956), T1 transmission system (1962), touch-tone dialing (1963), 1ESS electronic switch (1965), wide area telephone 800 service (1965), and first U.S. commercial fiber-optic system (1977).

First Public Demonstration of Television, 1926: London, UK, Dedicated 26 January 2017 - IEEE United Kingdom and Ireland Section

Members of the Royal Institution of Great Britain witnessed the world's first public demonstration of live television on 26 January 1926 in this building at 22 Frith Street, London. Inventor and entrepreneur John Logie Baird used the first floor as a workshop during 1924-1926, for various experimental activities, including the development of his television system. The BBC adopted Baird’s system for its first television broadcast service in 1930.

One-Way Police Radio Communication, 1928: Detroit, MI, U.S.A., Dedicated 1 May 1987 - IEEE Southeastern Michigan Section

At this site on April 7, 1928 the Detroit Police Department commenced regular one-way radio communication with its patrol cars. Developed by personnel of the department's radio bureau, the system was the product of seven years of experimentation under the direction of police commissioner, William P. Rutledge. Their work proved the practicality of land-mobile radio for police work and led to its adoption throughout the country.

Raman Effect, 1928: Kolkata, India, Dedicated 15 September 2012 - IEEE Kolkata Section

Sir Chandrasekhara Venkata Raman, Nobel-laureate (Physics-1930), assisted by K S Krishnan at IACS, Calcutta, India, discovered on 28 February 1928, that when a beam of coloured light entered a liquid, a fraction of the light scattered was of a different colour, dependent on material property. This radiation effect of molecular scattering of light bears his name as ‘Raman Effect’, from which many applications in photonic communications and spectroscopy evolved.

Shannon Scheme for the Electrification of the Irish Free State, 1929: Ardnacrusha, County Limerick, Ireland, Dedicated 29 July 2002 - IEEE United Kingdom and Ireland Section

The Shannon Scheme was officially opened at Parteen Weir on 22 July 1929. One of the largest engineering projects of its day, it was successfully executed by Siemens to harness the Shannon River. It subsequently served as a model for large-scale electrification projects worldwide. Operated by the Electricity Board of Ireland, it had an immediate impact on the social, economic and industrial development of Ireland and continues to supply significant power beyond the end of the 20th century.

Largest Private (dc) Generating Plant in the U.S.A., 1929: New York, New York, U.S.A., Dedicated 25 September 2008 - IEEE New York Section

The Direct Current (dc) generating plant installed at the New Yorker Hotel in 1929, capable of supplying electric power sufficient for a city of 35,000 people, was the largest private generating plant in the U.S.A. Steam engines drove electric generators, with exhaust steam used for heating and other facilities. The installation used more than two hundred dc motors, and was controlled from a seven-foot (two-meter) high, sixty-foot (eighteen-meter) long switchboard.

Yosami Radio Transmitting Station, 1929: Kariya City, Japan, Dedicated 19 May 2009 - IEEE Nagoya Section

In April 1929, the Yosami Station established the first wireless communications between Japan and Europe with a long wave operating at 17.442 kHz. An inductor-type high-frequency alternator provided output power at 500 kW. The antenna system used eight towers, each 250m high. The facilities were used for communicating with submarines by the Imperial Japanese Navy from 1941 to 1945 and by the United States Navy from 1950 to 1993.

First Blind Takeoff, Flight and Landing, 1929: Garden City, NY, U.S.A., Dedicated 24 September 2014 - IEEE Long Island Section

On 24 September 1929, the first blind takeoff, flight and landing occurred at Mitchel Field, Garden City, NY in a Consolidated NY-2 biplane piloted by Lt. James Doolittle. Equipped with specially designed radio and aeronautical instrumentation, it represented the cooperative efforts of many organizations, mainly the Guggenheim Fund’s Full Flight Laboratory, U.S. Army Air Corps, U.S. Dept. of Commerce, Sperry Gyroscope Company, Kollsman Instrument Company and Radio Frequency Laboratories.

1930-1939

Development of Ferrite Materials and Their Applications, 1930-1945: Tokyo, Japan, Dedicated 13 October 2009 - IEEE Tokyo Section

In 1930, at Tokyo Institute of Technology, Drs. Yogoro Kato and Takeshi Takei invented ferrite, a magnetic ceramic compound containing oxides of iron and of other metals with properties useful in electronics. TDK Corporation began mass production of ferrite cores in 1937 for use in radio equipment. The electric and electronics industries use ferrites in numerous applications today.

Invention of Stereo Sound Reproduction, 1931: London, UK, Dedicated 1 April 2015 - IEEE United Kingdom and Ireland Section

Alan Dower Blumlein filed a patent for a two-channel audio system called “stereo” on 14 December 1931. It included a "shuffling" circuit to preserve directional sound, an orthogonal “Blumlein Pair” of velocity microphones, the recording of two orthogonal channels in a single groove, stereo disc-cutting head, and hybrid transformer to mix directional signals. Blumlein brought his equipment to Abbey Road Studios in 1934 and recorded the London Philharmonic Orchestra.

First Breaking of Enigma Code by the Team of Polish Cipher Bureau, 1932-1939: Warsaw, Poland, Dedicated 5 August 2014 - IEEE Poland Section

Polish Cipher Bureau mathematicians Marian Rejewski, Jerzy Różycki and Henryk Zygalski broke the German Enigma cipher machine codes. Working with engineers from the AVA Radio Manufacturing Company, they built the ‘bomba’ – the first cryptanalytic machine to break Enigma codes. Their work was a foundation of British code breaking efforts which, with later American assistance, helped end World War II.

Two-Way Police Radio Communication, 1933: Bayonne, NJ, U.S.A., Dedicated 1 May 1987 - IEEE North Jersey Section

In 1933, the police department in Bayonne, New Jersey initiated regular two-way communications with its patrol cars, a major advance over previous one-way systems. The very high frequency system developed by radio engineer Frank A. Gunther and station operator Vincent J. Doyle placed transmitters in patrol cars to enable patrolmen to communicate with headquarters and other cars instead of just receiving calls. Two-way police radio became standard throughout the country following the success of the Bayonne system.

Invention of a Temperature-Insensitive Quartz Oscillation Plate, 1933: Tokyo, Japan, Dedicated 6 March 2017 - IEEE Tokyo Section

In April 1933, Issac Koga of the Tokyo Institute of Technology reported cutting angles that produced quartz crystal plates having a zero temperature coefficient of frequency. These angles, 54⁰ 45’ and 137⁰ 59’, he named the R₁ and R₂ cuts. Temperature-insensitive quartz crystal was used at first for radio transmitters and later for clocks, and has proven indispensable to all radio communication systems and much of information electronics.

Long-Range Shortwave Voice Transmissions from Byrd's Antarctic Expedition, 1934: Cedar Rapids, IA, Dedicated 1 February 2001 - IEEE Cedar Rapids Section

Beginning 3 February 1934, Vice Admiral Richard E. Byrd's Antarctic Expedition transmitted news releases to New York via short-wave radio voice equipment. From New York, the US nationwide CBS network broadcast the news releases to the public. Previous expeditions had been limited to dot-dash telegraphy, but innovative equipment from the newly formed Collins Radio Company made this long-range voice transmission feasible.

Westinghouse Atom Smasher, 1937: Forest Hills, PA, U.S.A., Dedicated 1 May 1985 - IEEE Pittsburgh Section

The five million volt van de Graaff generator represents the first large-scale program in nuclear physics established in industry. Constructed by the Westinghouse Electric Corporation in 1937, it made possible precise measurements of nuclear reactions and provided valuable research experience for the company's pioneering work in nuclear power.

Zenit Parabolic Reflector L-band Pulsed Radar, 1938: Kharkiv, Ukraine, Dedicated 31 May 2017 - IEEE Ukraine Section

The 1938 Zenit radar test at the Laboratory of Electromagnetic Oscillations of the Ukrainian Institute of Physics and Technology was a major advance in the development of radar. Designed by Abram Slutskin, Alexander Usikov, and Semion Braude, microwave scientists and magnetron pioneers, Zenit established the practicality of combining the pulsed method and a shorter wave band for determining precisely all three coordinates of airborne targets.

Atanasoff-Berry Computer, 1939: Ames, IA, U.S.A., Dedicated 1 April 1990 - IEEE Central Iowa Section

John Vincent Atanasoff conceived basic design principles for the first electronic-digital computer in the winter of 1937 and, assisted by his graduate student, Clifford E. Berry, constructed a prototype here in October 1939. It used binary numbers, direct logic for calculation, and a regenerative memory. It embodied concepts that would be central to the future development of computers.

Code-breaking at Bletchley Park during World War II, 1939-1945: Bletchley Park, United Kingdom, Dedicated 1 April 2003 - IEEE United Kingdom and Ireland Section

On this site during the 1939-45 World War, 12,000 men and women broke the German Lorenz and Enigma ciphers, as well as Japanese and Italian codes and ciphers. They used innovative mathematical analysis and were assisted by two computing machines developed here by teams led by Alan Turing: the electro-mechanical Bombe developed with Gordon Welchman, and the electronic Colossus designed by Tommy Flowers. These achievements greatly shortened the war, thereby saving countless lives.

Single-element Unidirectional Microphone - Shure Unidyne, 1939: Niles, IL, U.S.A., Dedicated 31 January 2014 - IEEE Chicago Section

In 1939, Shure Incorporated introduced the Unidyne microphone. Using the Uniphase acoustical system, the patented Unidyne was the first microphone to provide directional characteristics using a single dynamic element. This breakthrough offered lower cost, greater reliability and improved performance for communication and public address systems. Shure Unidyne microphones are still manufactured and used worldwide in numerous audio applications.

Development of Information Theory, 1939-1967: Cambridge, MA, Dedicated 17 May 2016 - IEEE Boston Section

The mathematical principles of Information Theory, laid down by Claude Elwood Shannon over the period 1939-1967, set in motion a revolution in communication system engineering. They quantified the concept of information, established fundamental limits in the representation and reliable transmission of information, and revealed the architecture of systems for approaching them. Today, Information Theory continues to provide the foundation for advances in information collection, storage, distribution, and processing.

Development of the Cavity Magnetron, 1939-1941: Birmingham UK, Dedicated 4 June 2024 - IEEE United Kingdom and Ireland Section

In this building from 1939 to 1941, University of Birmingham researchers John Randall, Harry Boot, and James Sayers conceived and demonstrated fundamental ways to improve the output power, efficiency, and frequency stability of cavity magnetrons. Further developed and refined by others, these advances facilitated the Allies' deployment of microwave radar systems in World War II. Cavity magnetrons were later adapted for use in industrial heating and microwave ovens.

1940-1949

FM Police Radio Communication, 1940: Hartford, CT, U.S.A., Dedicated 1 June 1987 - IEEE Connecticut Section

A major advance in police radio occurred in 1940 when the Connecticut state police began operating a two-way, frequency modulated (FM) system in Hartford. The statewide system developed by Daniel E. Noble of the University of Connecticut and engineers at the Fred M. Link Company greatly reduced static, the main problem of the amplitude modulated (AM) system. FM mobile radio became standard throughout the country following the success of the Connecticut system.

MIT Radiation Laboratory, 1940-1945: Cambridge, MA, U.S.A., Dedicated 1 October 1990 - IEEE Boston Section

The MIT Radiation Laboratory, operated on this site between 1940 and 1945, advanced the allied war effort by making fundamental contributions to the design and deployment of microwave radar systems. Used on land, sea, and in the air, in many adaptations, radar was a decisive factor in the outcome of the conflict. The laboratory's 3900 employees made lasting contributions to microwave theory and technology, operational radar, systems engineering, long-range navigation, and control equipment.

Loran, 1940 - 1946: Cambridge, MA, U.S.A., Dedicated 27 June 2012 - IEEE Boston Section

The rapid development of Loran -- long range navigation -- under wartime conditions at MIT’s Radiation Lab was not only a significant engineering feat but also transformed navigation, providing the world’s first near-real-time positioning information. Beginning in June 1942, the United States Coast Guard helped develop, install and operate Loran until 2010.

Opana Radar Site, 1941: Kuhuku, Hawaii, U.S.A., Dedicated 1 February 2000 - IEEE Hawaii Section

On December 7, 1941, an SCR-270b radar located at this site tracked incoming Japanese aircraft for over 30 minutes until they were obscured by the island ground clutter. This was the first wartime use of radar by the United States military, and led to its successful application throughout the theater.

US Naval Computing Machine Laboratory, 1942-1945: Dayton, Ohio, Dedicated 1 October 2001 - IEEE Dayton Section

In 1942, the United States Navy joined with the National Cash Register Company to design and manufacture a series of code-breaking machines. This project was located at the U.S. Naval Computing Machine Laboratory in Building 26, near this site. The machines built here, including the American "Bombes", incorporated advanced electronics and significantly influenced the course of World War II.

Whirlwind Computer, 1944-59: Cambridge, Massachusetts, Dedicated 27 June 2012 - IEEE Boston Section

The Whirlwind computer was developed at 211 Massachusetts Avenue by the Massachusetts Institute of Technology. It was the first real-time high-speed digital computer using random-access magnetic-core memory. Whirlwind featured outputs displayed on a CRT, and a light pen to write data on the screen. Whirlwindʼs success led to the United States Air Forceʼs Semi Automatic Ground Environment - SAGE - system and to many business computers and minicomputers.

Harvard Mark I Computer, 1944 - 1959: Cambridge, MA, Dedicated 10 November 2022 - IEEE Boston Section

The Mark I computer was a general-purpose electro-mechanical computer that could execute long computations automatically. It was conceived by Harvard University's Dr. Howard Aiken and built by International Business Machines Corporation in New York. The machine used mechanical punch-card tabulating equipment. Considered the first large-scale electro-mechanical computer, it was a leap forward in modern computing.

Merrill Wheel-Balancing System, 1945: Denver, CO, U.S.A., Dedicated 1 September 1999 - IEEE Denver Section

In 1945, Marcellus Merrill first implemented an electronic dynamic wheel-balancing system. Previously, all mechanical methods were static in nature and required removing the wheels from the vehicle. Merrill's innovative balancing system came to be widely used internationally. Elements of the dynamic balancing systems are still used today, primarily for industrial and automotive production applications.

Rincón del Bonete, 1945: Rincon del Bonete, Uruguay, Dedicated 14 December 2012 - IEEE Uruguay Section

In December, 1945, much-needed hydroelectric power began flowing from here to other parts of Uruguay. World War II had interrupted the work begun by a German consortium, but Uruguayan engineers reformulated and completed the project using United States-supplied equipment. The large artificial lake spurred further Rio Negro electrification; availability of abundant, clean hydroelectricity was a turning point in Uruguay's development, quality of life, and engineering profession.

Electronic Numerical Integrator and Computer, 1946: Philadelphia, PA, U.S.A., Dedicated 1 September 1987 - IEEE Philadelphia Section

A major advance in the history of computing occurred at the University of Pennsylvania in 1946 when engineers put the Electronic Numerical Integrator and Computer (ENIAC) into operation. Designed and constructed at the Moore School of Electrical Engineering under a U. S. Army contract during World War II, the ENIAC established the practicality of large scale, electronic digital computers and strongly influenced the development of the modern, stored-program, general-purpose computer.

Monochrome-Compatible Electronic Color Television, 1946-1953: Princeton, NJ, U.S.A., Dedicated 29 November 2001 - IEEE Princeton/Central Jersey Section

On this site between 1946 and 1950 the research staff of RCA Laboratories invented the world's first electronic, monochrome-compatible, color television system. They worked with other engineers in the industry for three years to develop a national analog standard based on this system, which lasted until the transition to digital broadcasting.

Detection of Radar Signals Reflected from the Moon, 1946: Wall, New Jersey, Dedicated 17 May 2019 - IEEE New Jersey Coast Section

On 10 January 1946, a team of military and civilian personnel at Camp Evans, Fort Monmouth, New Jersey, USA, reflected the first radar signals off the Moon using a specially modified SCR-270/1 radar. The signals took 2.5 seconds to travel to the Moon and back to the Earth. This achievement, Project Diana, marked the beginning of radar astronomy and space communications.

Invention of the First Transistor at Bell Telephone Laboratories, Inc., 1947: Murray Hill, NJ, U.S.A., Dedicated 8 December 2009 - IEEE North Jersey Section

At this site, in Building 1, Room 1E455, from 17 November to 23 December 1947, Walter H. Brattain and John A. Bardeen -- under the direction of William B. Shockley -- discovered the transistor effect, and developed and demonstrated a point-contact germanium transistor. This led directly to developments in solid-state devices that revolutionized the electronics industry and changed the way people around the world lived, learned, worked, and played.

Invention of Holography, 1947: London, England, Dedicated 12 June 2013 - IEEE United Kingdom and Ireland Section

In 1947 Dennis Gabor conceived the idea of wavefront reconstruction for improving the performance of the electron microscope. This became the basis for the invention of optical holography for three-dimensional imaging but implementation required coherent light sources and had to await the emergence of the laser some years later. Gabor was awarded the Nobel Prize for his invention in 1971.

Birthplace of the Bar Code, 1948: Philadelphia, PA, U.S.A., Dedicated 22 October 2012 - IEEE Philadelphia Section

In an attempt to automate the reading of product information in a local grocery store, Bernard Silver and Norman Joseph Woodland at the Drexel Institute of Technology developed a solution that became the ubiquitous Barcode Identification System. Patented in 1952, the Barcode has become a key technology for product identification and inventory control in industry and daily life.

The Discovery of the Principle of Self-Complementarity in Antennas and the Mushiake Relationship, 1948: Tohoku University, Dedicated 27 July 2017 - IEEE Sendai Section

In 1948, Prof. Yasuto Mushiake of Tohoku University discovered that antennas with self-complementary geometries are frequency independent, presenting a constant impedance, and often a constant radiation pattern over very wide frequency ranges. This principle is the basis for many very-wide-bandwidth antenna designs, with applications that include television reception, wireless broadband, radio astronomy, and cellular telephony.

First Atomic Clock, 1948: Washington, DC, Dedicated 8 August 2017 - IEEE Washington Section

The first atomic clock, developed near this site by Harold Lyons at the National Bureau of Standards, revolutionized timekeeping by using transitions of the ammonia molecule as its source of frequency. Far more accurate than previous clocks, atomic clocks quickly replaced the Earth’s rotational rate as the reference for world time. Atomic clock accuracy made possible many new technologies, including the Global Positioning System (GPS).

Manchester University "Baby" Computer and its Derivatives, 1948-1951: Manchester, UK, Dedicated 21 June 2022 - IEEE United Kingdom and Ireland Section

At this site on 21 June 1948 the “Baby” became the first computer to execute a program stored in addressable read-write electronic memory. “Baby” validated Williams-Kilburn Tube random-access memories, later widely used, and led to the 1949 Manchester Mark I which pioneered index registers. In February 1951, Ferranti Ltd's commercial derivative became the first electronic computer marketed as a standard product delivered to a customer.

Commercialization of the Fish Finder, 1949: Nishinomiya, Japan, Dedicated 25 April 2025 - IEEE Kansai Section

In 1949, Furuno Electric Company, Ltd. successfully commercialized the world’s first ﬁsh ﬁnder. Unlike echo sounders that detect strong echo signals from the seabed, the fish finder used an improved reception amplifier to detect weak echo signals reflected from fish schools, and ultrasonic transducers that protruded from the fishing boat’s bottom to minimize the influence of sailing noise. Fish finders dramatically reformed the fishery industry in Japan, and subsequently worldwide.

1950-1959

Electronic Technology for Space Rocket Launches, 1950-1969: Cape Canaveral, Florida, U.S.A., Dedicated 1 February 2001 - IEEE Canaveral Section

The demonstrated success in space flight is the result of electronic technology developed at Cape Canaveral, the J. F. Kennedy Space Center, and other sites, and applied here. A wide variety of advances in radar tracking, data telemetry, instrumentation, space-to-ground communications, on-board guidance, and real-time computation were employed to support the U.S. space program. These and other electronic developments provided infrastructure necessary for the successful landing of men on the moon in July 1969 and their safe return to earth.

First External Cardiac Pacemaker, 1950: Toronto, Canada, Dedicated 1 September 2009 - IEEE Toronto Section

In 1950, in Room 64 of the Bantling Institute of the University of Toronto, Drs. Wilfred Bigelow and John Callaghan successfully paced the heart of a dog using an external electronic pacemaker-defibrillator having implanted electrodes. The device was developed by Dr. John Hopps at the National Research Council of Canada. This pioneering work led to the use of cardiac pacemakers in humans and helped establish the importance of electronic devices in medicine.

Manufacture of Transistors, 1951: Allentown, PA, U.S.A., Dedicated 1 April 1989 - IEEE Lehigh Valley Section

The commercial manufacture of transistors began here in October 1951. Smaller, more efficient, and more reliable than the vacuum tubes they replaced, transistors revolutionized the electronics industry.

Experimental Breeder Reactor I, 1951: Idaho Falls, Idaho, U.S.A., Dedicated 4 June 2004 - IEEE Eastern Idaho Section

At this facility on 20 December 1951 electricity was first generated from the heat produced by a sustained nuclear reaction providing steam to a turbine generator. This event inaugurated the nuclear power industry in the United States. On 4 June 1953 EBR-I provided the first proof of "breeding“ capability, producing one atom of nuclear fuel for each atom burned, and later produced electricity using a plutonium core reactor.

SAGE-Semi-Automatic Ground Environment, 1951-1958: Lexington, Massachusetts, U.S.A., Dedicated 27 June 2012 - IEEE Boston Section

In 1951 the Massachusetts Institute of Technology undertook the development of an air defense system for the United States. The centerpiece of this defense system was a large digital computer originally developed at MIT. The MIT Lincoln Laboratory was formed to carry out the initial development of this system and the first of some 23 SAGE control centers was completed in 1958. SAGE was the forerunner of today’s digital computer networks.

A-0 Compiler and Initial Development of Automatic Programming, 1951-1952: Philadelphia, PA, Dedicated 7 May 2024 - IEEE Philadelphia Section

During 1951-1952, Grace Hopper invented the A-0 Compiler, a series of specifications that functioned as a linker/loader. It was a pioneering achievement of automatic programming as well as a pioneering utility program for the management of subroutines. The A-0 Compiler influenced the development of arithmetic and business programming languages. This led to COBOL (Common Business-Oriented Language) becoming the dominant high-level language for business applications.

First Television Broadcast in Western Canada, 1953: North Vancouver, BC, Canada, Dedicated 6 November 2010 - IEEE Vancouver Section

On 16 December 1953, the first television broadcast in Western Canada was transmitted from this site by the Canadian Broadcasting Corporation's CBUT Channel 2. The engineering experience gained here was instrumental in the subsequent establishment of the more than one thousand public and private television broadcasting sites that serve Western Canada today.

Gotland High Voltage Direct Current Link, 1954: Gotland, Sweden, Dedicated 15 May 2017 - IEEE Sweden Section

The Gotland HVDC Link was the world’s first commercial HVDC transmission link using the first submarine HVDC cable. It connected the Island of Gotland to mainland Sweden. The 96 km-long cable used mass-impregnated technology. The Swedish manufacturer ASEA produced the link for Vattenfall, the state-owned utility. The project used mercury-arc valves for the 20 MW/100 kV HVDC converters, developed by an ASEA-Vattenfall team led by Dr. Uno Lamm.

WEIZAC Computer, 1955: Rehovot, Israel, Dedicated 5 December 2006 - IEEE Israel Section

The Weizmann Institute of Science in Rehovot, Israel, built the Weizmann Automatic Computer (WEIZAC) during 1954-1955 with the scientific vision of Chaim Pekeris and the engineering leadership of Gerald Estrin. The WEIZAC was based on drawings from the IAS computer at Princeton University and built with much ingenuity. The machine was the first digital electronic computer constructed in the Middle East and it became an indispensable scientific computing resource for many scientists and engineers worldwide.

RAMAC, 1956: San Jose, CA, U.S.A., Dedicated 26 May 2005 - IEEE Santa Clara Valley Section

Developed by IBM in San Jose, California at 99 Notre Dame Street from 1952 until 1956, the Random Access Method of Accounting and Control (RAMAC) was the first computer system conceived around a radically new magnetic disk storage device. The extremely large capacity, rapid access, and low cost of magnetic disk storage revolutionized computer architecture, performance, and applications.

The First Submarine Transatlantic Telephone Cable System (TAT-1), 1956: Clarenville, Newfoundland, Canada, Sydney Mines, Nova Scotia, Canada, Oban, Scotland, Dedicated 24 September 2006 - IEEE Canadian Atlantic, Newfoundland-Labrador, United Kingdom and Ireland Section

Global telephone communications using submarine cables began on 25 September 1956, when the first transatlantic undersea telephone system, TAT-1, went into service. This site is the eastern terminal of the transatlantic cable that stretched west to Clarenville, Newfoundland. TAT-1 was a great technological achievement providing unparalleled reliability with fragile components in hostile environments. It was made possible through the efforts of engineers at AT&T Bell Laboratories and British Post Office. The system operated until 1978.

Kurobe River No. 4 Hydropower Plant, 1956-63: Kurobe, Japan, Dedicated 9 April 2010 - IEEE Kansai Section

Kansai Electric Power Co., Inc., completed the innovative Kurobe River No. 4 Hydropower Plant, including the subterranean power station and Kurobe Dam, in 1963. The 275kV long-distance transmission system delivered the generated electric power to the Kansai region and solved serious power shortages, contributing to industrial development and enhancing living standards for the population.

Ampex Videotape Recorder, 1956: Redwood City, CA, Dedicated 10 June 2016 - IEEE Santa Clara Valley Section

In 1956, Ampex Corporation of Redwood City, California, introduced the first practical videotape recorder for television stations and networks to produce and time-shift broadcasts, replacing impractical "kinescope" movie film previously used to record TV. The Emmy-award-winning Ampex "VTR" analog-video standard ruled broadcasting and video production worldwide for twenty years.

Birthplace of Silicon Valley, 1956: Mountain View, CA, Dedicated 15 August 2018 - IEEE Santa Clara Valley Section

At this location, 391 San Antonio Road, the Shockley Semiconductor Laboratory manufactured the first silicon devices in what became known as Silicon Valley. Some of the talented scientists and engineers initially employed there left to found their own companies, leading to the birth of the silicon electronics industry in the region. Hundreds of firms in electronics and computing can trace their origins back to Shockley Semiconductor.

First Wearable Cardiac Pacemaker, 1957-1958: Minneapolis, MN, U.S.A., Dedicated 1 October 1999 - IEEE Twin Cities Section

During the winter of 1957-58, Earl E. Bakken developed the first wearable transistorized pacemaker, the request of heart surgeon, Dr. C. Walton Lillehei. As earlier pacemakers were AC-powered, this battery-powered device liberated patients from their power-cord tethers. The wearable pacemaker was a significant step in the evolution to fully-implantable units.

SCR/Thyristor, 1957: Rochester, NY, Dedicated 14 June 2019 - IEEE Rochester Section

General Electric introduced the silicon controlled rectifier (SCR), a three-terminal p-n-p-n device, in 1957. The gas-filled tubes used previously were difficult to operate and unreliable. The symmetrical alternating current switch (TRIAC), the gate turn-off thyristor (GTO), and the large integrated gate-commutated thyristor (IGCT) evolved from the SCR. Its development revolutionized efficient control of electric energy and electrical machines.

Atlas Computer and the Invention of Virtual Memory, 1957-1962: Manchester, UK, Dedicated 21 June 2022 - IEEE United Kingdom and Ireland Section

The Atlas computer was designed and built in this building by Tom Kilburn and a joint team of the University of Manchester and Ferranti Ltd. The most significant new feature of Atlas was the invention of virtual memory, allowing memories of different speeds and capacities to act as a single large fast memory separately available to multiple users. Virtual memory became a standard feature of general-purpose computers.

First Semiconductor Integrated Circuit (IC), 1958: Dallas, TX, U.S.A., Dedicated 15 October 2009 - IEEE Dallas Section

On 12 September 1958, Jack S. Kilby demonstrated the first working integrated circuit to managers at Texas Instruments. This was the first time electronic components were integrated onto a single substrate. This seminal device consisted of a phase shift oscillator circuit on a tiny bar of germanium measuring 7/16” by 1/16” (11.1 mm by 1.6 mm). Today, integrated circuits are the fundamental building blocks of virtually all electronic equipment.

Star of Laufenburg Interconnection, 1958: Laufenburg, Switzerland, Dedicated 18 August 2010 - IEEE Switzerland Section

This is the original location of the electric-power interconnection of three countries: Switzerland, Germany and France. The Union for Production and Transmission of Electricity (now UCTE) was formed to manage this interconnection. This installation pioneered international connections, and technical and political cooperation for European integration. UCTE coordinated one of the largest synchronously connected power networks serving almost all of continental Europe.

The Trans-Canada Microwave System, 1958: Vancouver, Winnipeg, Halifax, Canada, Dedicated 1 July 2022 - IEEE Canadian Atlantic, Vancouver, Winnipeg Section

On 1 July 1958, the Trans-Canada Microwave System introduced live network television and direct-dialled long distance telephone service to Canadians from coast to coast. Comprising 139 towers spanning more than 6275 kilometres, it was, when completed, the world's longest such network. Later extended and upgraded, the system had an immense impact on Canada's society and economy.

Semiconductor Planar Process and Integrated Circuit, 1959: Palo Alto, CA, U.S.A., Dedicated 8 May 2009 - IEEE Santa Clara Valley Section

The 1959 invention of the Planar Process by Jean A. Hoerni and the Integrated Circuit (IC) based on planar technology by Robert N. Noyce catapulted the semiconductor industry into the silicon IC era. This pair of pioneering inventions led to the present IC industry, which today supplies a wide and growing variety of advanced semiconductor products used throughout the world.

Commercialization and Industrialization of Photovoltaic Cells, 1959: Nara and Osaka, Japan, Dedicated 9 April 2010 - IEEE Kansai Section

Sharp Corporation pioneered the development and commercialization of photovoltaic (PV) cells for applications ranging from satellites to lighthouses to residential uses. From the beginning of research into monocrystal PV-cells in 1959, to the mass production of amorphous PV-cells in 1983, this work contributed greatly toward the industrialization of photovoltaic technologies and toward the mitigation of global warming.

1960-1969

IBM Thomas J. Watson Research Center, 1960 - 1984: Yorktown Heights, NY, U.S.A., Dedicated 16 October 2009 - IEEE New York Section

In its first quarter century, the IBM Thomas J. Watson Research Center produced numerous seminal advances having sustained worldwide impact in electrical engineering and computing. Semiconductor device innovations include dynamic random access memory (DRAM), superlattice crystals, and field effect transistor (FET) scaling laws. Computing innovations include reduced instruction set computer (RISC) architecture, integer programming, amorphous magnetic films for optical storage technology, and thin-film magnetic recording heads.

TIROS I Television Infrared Observation Satellite, 1960: Princeton, NJ, U.S.A., Dedicated 27 September 2010 - IEEE Princeton/Central Jersey Section

TIROS 1 - TELEVISION INFRA-RED OBSERVATION SATELLITE, 1960 On 1 April 1960, the National Aeronautical and Space Administration launched TIROS I, the world's first meteorological satellite, to capture and transmit video images of the Earth's weather patterns. RCA staff at Defense Electronics Products, the David Sarnoff Research Center, and Astro-Electronics Division designed and constructed the satellite and ground station systems. TIROS I pioneered meteorological and environmental satellite television for an expanding array of purposes.

First Working Laser, 1960: Malibu, CA, U.S.A., Dedicated 23 November 2010 - IEEE Metropolitan Los Angeles Section

On this site in May 1960 Theodore Maiman built and operated the first laser. A number of teams around the world were trying to construct this theoretically anticipated device from different materials. Maiman’s was based on a ruby rod optically pumped by a flash lamp. The laser was a transformative technology in the 20th century and continues to enjoy wide application in many fields of human endeavor.

First Optical Fiber Laser and Amplifier, 1961-1964: Southbridge, MA, U.S.A., Dedicated 26 October 2012 - IEEE Worcester County Section

In 1961, Elias Snitzer and colleagues constructed and operated the world's first optical fiber laser in the former American Optical complex at 14 Mechanic Street. Three years later this team demonstrated the first optical fiber amplifier. Fiber lasers that can cut and weld steel have since become powerful industrial tools and fiber amplifiers routinely boost signals in the global optical fiber network allowing messages to cross oceans and continents without interruption.

Object-Oriented Programming, 1961-1967: University of Oslo, Dedicated 27 September 2017 - IEEE Norway Section

Ole-Johan Dahl and Kristen Nygaard created the Simula programming languages in the 1960s at the Norwegian Computer Center. They introduced a new way of modeling and simulating complex tasks. Object-oriented programming is now dominant in systems development. It is an integral part of computer science curricula, as are languages built on object-oriented programming concepts, such as Smalltalk, C++, Java, and Python.

Stanford Linear Accelerator Center, 1962: Menlo Park, CA, U.S.A., Dedicated 1 February 1984 - IEEE Santa Clara Valley Section

The Stanford two-mile accelerator, the longest in the world, accelerates electrons to the very high energy needed in the study of subatomic particles and forces. Experiments performed here have shown that the proton, one of the building blocks of the atom, is in turn composed of smaller particles now called quarks. Other research here has uncovered new families of particles and demonstrated subtle effects of the weak nuclear force. This research requires the utmost precision in the large and unique electromechanical devices and systems that accelerate, define, deliver and store the beams of particles, and in the detectors that analyze the results of the particle interactions.

Alouette-ISIS Satellite Program, 1962: Ottawa, Ontario, Canada, Dedicated 1 May 1993 - IEEE Ottawa Section

Driven by the need to understand the characteristics of radio communication in Canada's North, Canadian researchers focused on the exploration of the earth's upper atmosphere, the ionosphere. Canada's satellite program commenced with the launch of Alouette-I on September 29, 1962. Alouette-II followed in 1965, ISIS-I in 1969, ISIS-II in 1971. The Alouette/ISIS tracking antenna serves as a reminder of Canada's contribution to this international effort in space science. IEEE Canada maintains a web site on this Milestone.

First Transatlantic Television Signal via Satellite, 1962: Goonhilly Downs, Cornwall, England, Dedicated 1 July 2002 - IEEE United Kingdom and Ireland Section

On 11 July 1962 this site transmitted the first live television signal across the Atlantic from Europe to the USA, via TELSTAR. This Satellite Earth Station was designed and built by the British Post Office Engineering Department. Known as 'Arthur' (of "Knights of the Round Table" fame), its open-dish design became a model for satellite television earth stations throughout the world.

First Transatlantic Transmission of a Television Signal via Satellite, 1962: Andover, ME, U.S.A., Dedicated 1 July 2002 - IEEE Maine Section

On 11 July 1962 this site transmitted the first transatlantic TV signal to a twin station in Pleumeur-Bodou, France via the TELSTAR satellite. The success of TELSTAR and the earth stations, the first built for active satellite communications, illustrated the potential of a future world-wide satellite system to provide communications between continents.

First Transatlantic Reception of a Television Signal via Satellite, 1962: Pleumeur-Bodou, France, Dedicated 1 July 2002 - IEEE France Section

On 11 July 1962 this site received the first transatlantic transmission of a TV signal from a twin station in Andover, Maine, USA via the TELSTAR satellite. The success of TELSTAR and the earth stations, the first built for active satellite communications, illustrated the potential of a future world-wide satellite system to provide communications between continents.

Pioneering Work on the Quartz Electronic Wristwatch, 1962-1967: Neuchâtel, Switzerland, Dedicated 28 September 2002 - IEEE Switzerland Section

A key milestone in development of the quartz electronic wristwatch in Switzerland was the creation in 1962 of the Centre Electronique Horloger of Neuchâtel. The Centre produced the first prototypes incorporating dedicated integrated circuits that set new timekeeping performance records at the International Chronometric Competition held at this observatory in 1967. Since then quartz watches, with hundreds of millions of units produced, became an extremely successful electronic system.

Mercury Spacecraft MA-6, 1962: St Louis, MO, U.S.A., Dedicated 24 February 2011 - IEEE Saint Louis Section

Col. John Glenn piloted the Mercury Friendship 7 spacecraft in the first United States human orbital flight on 20 February 1962. Electrical and electronic systems invented by McDonnell engineers, including IRE members, made his and future spaceflights possible. Among the key contributions were navigation and control instruments, autopilot, rate stabilization and control, and fly-by-wire (FBW) systems.

Grumman Lunar Module, 1962-1972: Bethpage, New York, U.S.A., Dedicated 20 July 2011 - IEEE Long Island Section

The Grumman Lunar Module was the first vehicle to land man on an extraterrestrial body, the Moon. Because it was designed to fly solely in space, its design, construction and testing continuously pushed the technology envelope for lightweight metals and unique electrical and electronic systems resulting in one of the most important and successful engineering achievements of mankind.

Apollo Guidance Computer, 1962-1972: Cambridge, Massachusetts, U.S.A., Dedicated 13 December 2011 - IEEE Boston Section

The Apollo Guidance Computer provided spacecraft guidance, navigation, and control during all of NASA’s Apollo Moon missions. It was developed under the leadership of Dr. Charles Stark Draper at the MIT Instrumentation Lab - now Draper Laboratory. This pioneering digital flight computer was the first real-time embedded computing system to collect data automatically and provide mission-critical calculations for the Apollo Command Module and Lunar Module.

First Geographic Information System (GIS), 1962-1968: Ottawa, Ontario, Dedicated 11 August 2023 - IEEE Ottawa Section

The first Geographic Information System (GIS) was developed by Roger Tomlinson at the Canadian Department of Forestry and Rural Development in Ottawa. GIS used computer technology to collect, digitize, store, analyze, and visualize Canada Land Inventory information. It subsequently revolutionized science, decision-making, and everyday life worldwide by allowing overlay, measurement, and spatial analysis of geographic data to include information about agriculture, wildlife, forestry, recreation, and transportation.

Semiconductor Laser, 1962: Niskayuna, NY, Yorktown Heights, NY, Lexington, MA, Dedicated 2 February 2024 - IEEE Schenectady, New York, Boston Section

In the autumn of 1962, General Electric’s Schenectady and Syracuse facilities, IBM Thomas J. Watson Research Center, and MIT Lincoln Laboratory each independently reported the first demonstrations of the semiconductor laser. Smaller than a grain of rice, powered using direct current injection, and available at wavelengths spanning the ultraviolet to the infrared, the semiconductor laser became ubiquitous in modern communications, data storage, and precision measurement systems.

NAIC/Arecibo Radiotelescope, 1963: Arecibo, Puerto Rico, Dedicated 1 November 2001 - IEEE Puerto Rico & Caribbean Section

The Arecibo Observatory, the world's largest radiotelescope, was dedicated in 1963. Its design and implementation led to advances in the electrical engineering areas of antenna design, signal processing, and electronic instrumentation, and in the mechanical engineering areas of antenna suspension and drive systems. The drive system positions all active parts of the antenna with millimeter precision, regardless of temperature changes, enabling the telescope to maintain an accurate focus. Its subsequent operation led to advances in the scientific fields of radioastronomy, planetary studies, and space and atmospheric sciences.

Taum Sauk Pumped-Storage Electric Power Plant, 1963: Proffit Mountain, Missouri, U.S.A., Dedicated 1 September 2005 - IEEE Saint Louis Section

The Taum Sauk Plant, when it came on-line in 1963, was the largest pure pumped-storage electric power plant in North America. Other pioneering features for this pumped-storage plant were its high capacity turbine-generators and its ability to be operated remotely, 90 miles away, from St. Louis, Missouri.

First Transpacific Reception of a Television (TV) Signal via Satellite, 1963: Takahagi City, Japan, Dedicated 23 November 2009 - IEEE Tokyo Section

First Transpacific Reception of a Television (TV) Signal via Satellite, 1963 On 23 November 1963, this site received the first transpacific transmission of a TV Signal from Mojave earth station in California, U.S.A., via the Relay 1 communications satellite. The Ibaraki earth station used a 20m Cassegrain antenna, the first use of this type of antenna for commercial telecommunications. This event demonstrated the capability and impact of satellite communications and helped open a new era of intercontinental live TV programming relayed via Satellite.

American Standard Code for Information Interchange ASCII, 1963: AT&T Labs, 200 S Laurel Ave., Middletown, NJ, U.S.A., Dedicated 19 May 2016 - IEEE New Jersey Coast Section

ASCII, a character-encoding scheme originally based on the Latin alphabet, became the most common character encoding on the World Wide Web through 2007. ASCII is the basis of most modern character-encoding schemes. The American Standards Association X3.2 subcommittee published the first edition of the ASCII standard in 1963. Its first widespread commercial implementation was in the American Telephone & Telegraph (AT&T) Teletypewriter eXchange network and Teletype Model 33 teleprinters.

Mount Fuji Radar System, 1964: Mount Fuji, Japan, Dedicated 6 March 2000 - IEEE Tokyo Section

Completed in 1964 as the highest weather radar in the world in the pre-satellite era, the Mount Fuji Radar System almost immediately warned of a major storm over 800 km away. In addition to advancing the technology of weather radar, it pioneered aspects of remote-control and low-maintenance of complex electronic systems. The radar was planned by the Japan Meteorological Agency and constructed by Mitsubishi Electric Corporation.

Tokaido Shinkansen (Bullet Train), 1964: Nagoya, Japan, Dedicated 13 July 2000 - IEEE Nagoya Section

Tokaido Shinkansen (Bullet Train) was designed with the world's most advanced electrical and mechanical train technologies to operate at speeds up to 210 km/hr, a world record when it began service in 1964. It has carried over 100 million passengers per year for many years with an excellent safety record.

Pioneering Work on Electronic Calculators, 1964-1973: Tenri City, Nara Prefecture, Japan, Dedicated 1 December 2005 - IEEE Kansai Section

A Sharp Corporation project team designed and produced several families of electronic calculators on the basis of all-transistor (1964), bipolar and MOS integrated circuit (1967), MOS Large Scale Integration (1969) and CMOS-LSI/Liquid Crystal Display (1973). The integration of CMOS-LSI and LCD devices onto a single glass substrate yielded battery-powered calculators. These achievements made possible the widespread personal use of hand-held calculators

TPC-1 Transpacific Cable System, 1964: Honolulu, Hawaii, Dedicated 11 November 2014 - IEEE Hawaii, Tokyo Section

The plaque may be viewed at Hawaiian Telcom, 1177 Bishop Street, Honolulu, Hawaii, 96822 U.S.A. The first transpacific undersea coaxial telephone cable linking Japan, Hawaii, and the U.S. mainland was completed in 1964. President Lyndon B. Johnson and Prime Minister Hayato Ikeda inaugurated this communications link on 19 June 1964. This joint project involving American Telephone and Telegraph, Hawaiian Telephone Company, and Kokusai Denshin Denwa improved global communication and contributed to deep water submarine cable technologies.

The High Definition Television System, 1964-1989: Tokyo, Dedicated 11 May 2016 - IEEE Tokyo Section

NHK (Japan Broadcasting Corporation) developed high-definition television (HDTV), a high-resolution and wide-screen television system designed to convey a strong sense of reality to viewers. Research began in 1964, ranging from psychophysical experiments to system development. In 1989, the world's first HDTV broadcast via satellite opened a new era in broadcasting. Since 1989, HDTV has spread throughout the world.

BASIC Computer Language, 1964: Hanover, NH, Dedicated 22 February 2021 - IEEE New Hampshire Section

Beginner's All-purpose Symbolic Instruction Code (BASIC) was created in this building. During the mid-1970s and 1980s, BASIC was the principal programming language used on early microcomputers. Its simplicity and wide acceptance made it useful in fields beyond science and mathematics, and enabled more people to harness the power of computation.

Alvin Deep-Sea Research Submersible, 1965-1984: Woods Hole, MA, Dedicated 21 October 2022 - IEEE Providence Section

In 1965, the U.S. Navy commissioned the Woods Hole Oceanographic Institution’s deep-sea submersible, Alvin. From 1974-84, Alvin’s engineers developed acoustical navigation (ALNAV), communications, photography, lighting, and life support systems specifically intended for the deepest oceans. It became one of the world’s most important deep-sea scientific instruments. Alvin discovered effects of pressure on seafloor microbes, and Alvin's study of hydrothermal vents revolutionized our understanding of life’s origins.

First 735 kV AC Transmission System, 1965: Quebec, Canada, Dedicated 1 November 2005 - IEEE Quebec Section

Hydro-Quebec's 735,000 volt electric power transmission system was the first in the world to be designed, built and operated at an alternating-current voltage above 700 kV. This development extended the limits of long-distance transmission of electrical energy. On 29 November 1965 the first 735 kV line was inaugurated. Power was transmitted from the Manicouagan-Outardes hydro-electric generating complex to Montreal, a distance of 600 km.

Railroad Ticketing Examining System, 1965-1971: Osake, Japan, Dedicated 27 November 2007 - IEEE Kansai Section

Pioneering ticket examining machines, designed to speed commuter railroad use substantially, were first installed in 1965, based on work by a joint research team of Osaka University and Kintetsu Corporation. Following this work, an improved version -- based on joint work by Omron, Kintetsu, and Hankyu corporations using punched cards and magnetic cards -- was first deployed in 1967 and at nineteen stations in 1971.

Dadda's Multiplier, 1965: Milano, Italy, Dedicated 26 September 2016 - IEEE Italy Section

Luigi Dadda published the first description of the optimized scheme, subsequently called a Dadda Tree, for a digital circuit to compute the multiplication of unsigned fixed-point numbers in binary arithmetic. This circuit allowed the arithmetic units of microprocessor-based computers to execute complex arithmetic operations with a performance/cost ratio unequaled at that time. His research and teaching pioneered computer engineering in Italy.

Moore's Law, 1965: Mountain View, CA, Dedicated 15 August 2018 - IEEE Santa Clara Valley Section

Gordon E. Moore, co-founder of Fairchild and Intel, began his work in silicon microelectronics at Shockley Semiconductor Laboratory in 1956. His 1965 prediction at Fairchild Semiconductor, subsequently known as "Moore’s Law,” that the number of components on an integrated circuit will increase exponentially with time while cost per function decreases, guided the industry's contributions to advances in electronics and computing for more than fifty years.

Development of Computer Graphics and Visualization Techniques, 1965-1978: Utah, Dedicated 24 March 2023 - IEEE Utah Section

In 1965, the University of Utah established a Center of Excellence for computer graphics research with Advanced Research Projects Agency (ARPA) funding. In 1968, two professors founded the pioneering graphics hardware company Evans & Sutherland; by 1978, fundamental rendering and visualization techniques disclosed in doctoral dissertations included the Warnock algorithm, Gouraud shading, the Catmull-Rom spline, and the Blinn-Phong reflection model. Alumni-founded companies include Atari, Silicon Graphics, Adobe, Pixar, and Netscape.

Interactive Video Games, 1966: Nashua, NH, USA, Dedicated 21 September 2015 - IEEE New Hampshire Section

The "Brown Box" console, developed at Sanders Associates - later BAE Systems - between 1966 and 1968, was the first interactive video game system to use an ordinary home television set. This groundbreaking device and the production-engineered version Magnavox Odyssey game system (1972) spawned the commercialization of interactive console video games, which became a multi-billion dollar industry.

DIALOG Online Search System, 1966: Mountain View, CA, Dedicated 23 May 2019 - IEEE Santa Clara Valley Section

DIALOG was the first interactive, online search system addressing large databases while allowing iterative refinement of results. DIALOG was developed at Lockheed Palo Alto Research Laboratory in 1966, extended through contracts with NASA, and offered commercially in 1972. Its speed, ease of use, and wide range of data content attracted professional users worldwide including scientists, attorneys, educators and librarians. DIALOG preceded major Internet search tools by more than two decades.

First Radio Astronomical Observations Using Very Long Baseline Interferometry, 1967: Kaleden, British Columbia, Canada, Dedicated 25 September 2010 - IEEE Vancouver Section

On the morning of 17 April 1967, radio astronomers used this radiotelescope at DRAO and a second one at the Algonquin Radio Observatory located 3074 km away to make the first successful radio astronomical observations using Very Long Baseline Interferometry. Today, VLBI networks span the globe, extend into space and continue to make significant contributions to both radio astronomy and geodesy.

CERN Experimental Instrumentation, 1968: Geneva, Switzerland, Dedicated 26 September 2005 - IEEE France Section

At CERN laboratories the invention of multiple-wire proportional chambers and drift chambers revolutionized the domain of electronic particle detectors, leading to new research on the constitution of matter. The development of unique electrical and electronic devices made possible the major high-energy physics experiments which have been recognized worldwide.

Liquid Crystal Display, 1968: Princeton, NJ, U.S.A., Dedicated 30 September 2006 - IEEE Princeton/Central Jersey Section

Between 1964 and 1968, at the RCA David Sarnoff Research Center in Princeton, New Jersey, a team of engineers and scientists led by George H. Heilmeier with Louis A. Zanoni and Lucian A. Barton, devised a method for electronic control of light reflected from liquid crystals and demonstrated the first liquid crystal display. Their work launched a global industry that now produces millions of LCDs annually for watches, calculators, flat-panel displays in televisions, computers and instruments.

Public Demonstration of Online Systems and Personal Computing, 1968: Menlo Park, CA, Dedicated 19 March 2017 - IEEE Santa Clara Valley Section

Commonly termed the "Mother of All Demos," Douglas Engelbart and his team demonstrated their oNLine System (NLS) at the San Francisco Civic Auditorium on 9 December 1968. Connected via microwave link to the host computer and other remote users at SRI in Menlo Park, the demonstration showcased many fundamental technologies that would become ubiquitous, including collaborative online editing, hypertext, video conferencing, word processing, spell checking, revision control, and the mouse.

Electronic Quartz Wristwatch, 1969: Tokyo, Japan, Dedicated 25 November 2004 - IEEE Tokyo Section

After ten years of research and development at Suwa Seikosha, a manufacturing company of Seiko Group, a team of engineers headed by Tsuneya Nakamura produced the first quartz wristwatch to be sold to the public. The Seiko Quartz-Astron 35SQ was introduced in Tokyo on December 25, 1969. Crucial elements included a quartz crystal oscillator, a hybrid integrated circuit, and a miniature stepping motor to turn the hands. It was accurate to within five seconds per month.

Birthplace of the Internet, 1969: University of California, Los Angeles, California, U.S.A., Dedicated 29 October 2009 - IEEE Coastal Los Angeles Section

At 10:30 p.m., 29 October 1969, the first ARPANET message was sent from this UCLA site to the Stanford Research Institute. Based on packet switching and dynamic resource allocation, the sharing of information digitally from this first node of ARPANET launched the Internet revolution.

Inception of the ARPANET, 1969: Menlo Park, California, U.S.A., Dedicated 16 September 2009 - IEEE Santa Clara Valley Section

SRI was one of the first two nodes, with the University of California at Los Angeles, on the ARPANET, the first digital global network based on packet switching and demand access. The first documented ARPANET connection was from UCLA to SRI on 29 October 1969 at 10:30 p.m. The ARPANET’s technology and deployment laid the foundation for the development of the Internet.

Invention of Public-key Cryptography, 1969 - 1975: Cheltenham, England, Dedicated 5 October 2010 - IEEE United Kingdom and Ireland Section

At Great Britain's Government Communications Headquarters (GCHQ), by 1975 James Ellis had proved that a symmetric secret-key system is unnecessary and Clifford Cocks with Malcolm Williamson showed how such 'public-key cryptography' could be achieved. Until then it was believed that secure communication was impossible without exchange of a secret key, with key distribution a major impediment. With these discoveries the essential principles were known but were kept secret until 1997.

Apollo 11 Lunar Laser Ranging Experiment (LURE), 1969: Lick Observatory, San Jose, CA, Dedicated 1 August 2019 - IEEE Santa Clara Valley Section

On 1 August 1969, Lick Observatory made the first Earth-to-Moon distance measurement with centimeter accuracy. The researchers fired a gigawatt ruby laser at a retro-reflector array placed on the Moon by Apollo 11 astronauts, and measured the time delay in detecting the reflected pulse. This was the first experiment using a hand-placed extraterrestrial instrument.

Parkes Radiotelescope, 1969: Parkes, Australia, Dedicated 11 October 2019 - IEEE New South Wales Section

Parkes radiotelescope and Honeysuckle Creek stations in Australia received voice and video signals from the Apollo 11 moonwalk, which were redistributed to millions of viewers. Parkes' televised images were superior to other ground stations, and NASA used them for much of the broadcast. One of the first to use the newly developed corrugated feed horn, Parkes became the model for the NASA Deep Space Network large aperture antennas.

Mode S Air Traffic Control Radar Beacon System, 1969-1995: Lexington, MA, Dedicated 2 February 2024 - IEEE Boston Section

In 1969, MIT Lincoln Laboratory began developing the Mode S selective secondary surveillance radar beacon system to enable safe air traffic control in busy, spectrum-congested airspace. This technology made more efficient use of the radio spectrum than previous systems. By 1995, the Mode S techniques and transmission codes became the worldwide standard for air traffic control radars.

1970-1979

World's First Low-Loss Optical Fiber for Telecommunications, 1970: Corning, NY, U.S.A., Dedicated 1 May 2012 - IEEE Rochester Section

In 1970, Corning scientists Dr. Robert Maurer, Dr. Peter Schultz, and Dr. Donald Keck developed a highly pure optical glass that effectively transmitted light signals over long distances. This astounding medium, which is thinner than a human hair, revolutionized global communications. By 2011, the world depended upon the continuous transmission of voice, data, and video along more than 1.6 billion kilometers of optical fiber installed around the globe.

The First Word Processor for the Japanese Language, 1971-1978: Tokyo, Japan, Dedicated 1 November 2008 - IEEE Tokyo Section

At this site, between 1971 and 1978, the first Japanese-language word processor was developed. Researchers headed by Ken-ichi Mori created a wholly new concept of Japanese word processing. Their first practical system, JW-10, was publicly unveiled on 3 October 1978. The JW-10, and improved versions, played a major role in advancing the Information Age in Japan, and provided the basis for Japanese-language word-processing software in personal computers.

SPICE (Simulation Program with Integrated Circuit Emphasis), 1969-1970: Berkeley, CA, U.S.A., Dedicated 20 February 2011 - IEEE Santa Clara Valley, Oakland-East Bay Section

SPICE (Simulation Program with Integrated Circuit Emphasis) was created at UC Berkeley as a class project in 1969-1970. It evolved to become the worldwide standard integrated circuit simulator. SPICE has been used to train many students in the intricacies of circuit simulation. SPICE and its descendents have become essential tools employed by virtually all integrated circuit designers.

Demonstration of the ALOHA Packet Radio Data Network, 1971: Honolulu, Hawaii, Dedicated 13 October 2020 - IEEE Hawaii Section

In June 1971, the ALOHA packet radio data network began providing inter-island access to computing facilities at the University of Hawaii. ALOHAnet was the first to demonstrate that communication channels could be effectively and efficiently shared on a large scale using simple random access protocols. It led directly to the development of Ethernet and personal wireless communication technologies.

First Computerized Tomography (CT) X-ray Scanner, 1971: Middlesex, England, Dedicated 26 October 2022 - IEEE United Kingdom and Ireland Section

On 1 October 1971, a team at the EMI Research Laboratories located on this site produced an image of a patient’s brain, using the world’s first clinical X-ray computerized tomography scanner, based on the patented inventions of Godfrey Hounsfield. The practical realization of high-resolution X-ray images of internal structures of the human body marked the beginning of a new era in clinical medicine.

Development of the Commercial Laser Printer, 1971-1977: Palo Alto, CA, Dedicated 17 May 2024 - IEEE Santa Clara Valley Section

Xerox PARC researchers demonstrated the feasibility of laser printing on a one-page-per-second Xerox copier in 1971, and with computer-generated images in 1972. As the networked printer in 1974, it transformed office automation and led to desktop publishing at PARC. The Xerox 9700 printer proved commercial viability in 1977, and helped launch the non-impact printer industry into a new era of printed communication for print shops, home, and office.

Nelson River HVDC Transmission System, 1972: Winnipeg, Manitoba, Canada, Dedicated 3 June 2005 - IEEE Winnipeg Section

On 17 June 1972, the Nelson River High Voltage Direct Current (HVDC) transmission system began delivery of electric power. It used the highest operating voltage to deliver the largest amount of power from a remote site to a city. The bipolar scheme gave superior line reliability and the innovative use of the controls added significantly to the overall system capabilities. Finally, the scheme used the largest mercury arc valves ever developed for such an application.

Development of the HP-35, the First Handheld Scientific Calculator, 1972: Palo Alto, California, U.S.A., Dedicated 14 April 2009 - IEEE Santa Clara Valley Section

The HP-35 was the first handheld calculator to perform transcendental functions (such as trigonometric, logarithmic and exponential functions). Most contemporary calculators could only perform the four basic operations – addition, subtraction, multiplication, and division. The HP-35 and subsequent models have replaced the slide rule, used by generations of engineers and scientists. The HP-35 performed all the functions of the slide rule to ten-digit precision over a full two-hundred-decade range.

Eel River High Voltage Direct Current Converter Station, 1972: Eel River, Northern New Brunswick, Canada, Dedicated 24 February 2011 - IEEE New Brunswick Section

Eel River High Voltage Direct Current Converter Station, 1972Operating since 1972, Eel River, New Brunswick is home to the world's first commercial solid state High Voltage Direct Current converter station. This 320 MW interconnection facility, built by Canadian General Electric and NB Power, incorporates high current silicon solid state thyristors to convert alternating current from Hydro Quebec to direct current and back to alternating, allowing asynchronous, stable power transfers to serve NB Power's customers.

First Practical Field Emission Electron Microscope, 1972: Tokyo, Japan, Dedicated 31 January 2012 - IEEE Tokyo Section

Hitachi developed practical field emission electron source technology in collaboration with Albert Crewe of the University of Chicago, and commercialized the world’s first field emission scanning electron microscope in 1972. This technology enabled stable and reliable ultrahigh resolution imaging with easy operation. Field emission electron microscopes have made invaluable contributions to the progress of science, technology and industry in physics, biology, materials, and semiconductor devices.

SHAKEY: The World’s First Mobile Intelligent Robot, 1972: Menlo Park, CA, Dedicated 16 February 2017 - IEEE Santa Clara Valley Section

Stanford Research Institute's Artificial Intelligence Center developed the world’s first mobile intelligent robot, SHAKEY. It could perceive its surroundings, infer implicit facts from explicit ones, create plans, recover from errors in plan execution, and communicate using ordinary English. SHAKEY's software architecture, computer vision, and methods for navigation and planning proved seminal in robotics and in the design of web servers, automobiles, factories, video games, and Mars rovers.

Polymer Self-Regulating Heat-Tracing Cable, 1972: Redwood City, California, Dedicated 28 August 2019 - IEEE Santa Clara Valley Section

In 1972, Raychem Corporation patented and began producing the first commercially successful electric self-regulating heat tracing cable. The conductive polymer in this cable revolutionized the temperature maintenance of process piping, which has had major applications in refineries and chemical plants, and made freeze protection of water pipes simple and energy efficient. By 2008, the firm had manufactured and sold one billion feet of this cable.

Gravitational-Wave Antenna, 1972-1989: Region 5: Livingston, LA, Region 6: Richland, WA, Region 8: Santo Stefano a Macerata - Cascina (Pisa), Italy, Dedicated 3 February 2021 - IEEE Baton Rouge, Italy, Richland Section

Livingston, LA LIGO plaque: Gravitational-Wave Antenna, 1972-1989Initially developed from 1972 to 1989, the Gravitational-Wave Antenna enabled detection of ripples in spacetime propagating at the speed of light, as predicted by Albert Einstein's 1916 Theory of General Relativity. Construction of Livingston's Laser Interferometer Gravitational-Wave Observatory (LIGO) commenced in 1995. In 2015, LIGO antennas, located here and in Washington state, first detected gravitational waves produced 1.3 billion years ago from two merging black holes.Richland (Hanford), WA LIGO plaque:Gravitational-Wave Antenna, 1972-1989Initially developed from 1972 to 1989, the Gravitational-Wave Antenna enabled detection of ripples in spacetime propagating at the speed of light, as predicted by Albert Einstein's 1916 Theory of General Relativity. Construction of Hanford's Laser Interferometer Gravitational-Wave Observatory (LIGO) commenced in 1994. In 2015, LIGO antennas, located here and in Louisiana, first detected gravitational waves produced 1.3 billion years ago from two merging black holes.Cascina (Pisa), Italy Virgo plaque:Gravitational-Wave Antenna, 1972-1989Initially developed from 1972 to 1989, the Gravitational-Wave Antenna enabled detection of ripples in spacetime propagating at the speed of light, as predicted by Albert Einstein's 1916 Theory of General Relativity. Construction of the Virgo Gravitational-Wave Observatory commenced in 1997. In 2017, Virgo and two antennas located in the U.S.A. launched the era of Multi-Messenger Astronomy with the coordinated detection of gravitational waves from a binary neutron star merger.

Deep Space Station 43, 1972-1987: Paddy's River District ACT, Dedicated 6 March 2024 - IEEE Australian Capital Territory Section

First operational in 1972 and later upgraded in 1987, Deep Space Station 43 (DSS-43) is a steerable parabolic antenna that supported the Apollo 17 lunar mission, Viking Mars landers, Pioneer and Mariner planetary probes, and Voyager's encounters with Jupiter, Saturn, Uranus, and Neptune. Planning for many robotic and human missions to explore the Solar System and beyond has included DSS-43 for critical communications and tracking in NASA’s Deep Space Network.

The Xerox Alto Establishes Personal Networked Computing, 1972-1983: Palo Alto, CA, Dedicated 17 May 2024 - IEEE Santa Clara Valley Section

Xerox Palo Alto Research Center (PARC) researchers developed novel hardware and software for the Xerox Alto computer, setting the model for personal computing for decades. The Alto incorporated a high-resolution display, mouse, and PARC-developed Ethernet networking. Alto software developments in programming languages, graphical user interfaces, printing, graphics, word processing, networking, and email were widely and profoundly influential.

Pulse Oximetry, 1972: Saitama, Japan, Dedicated 14 November 2024 - IEEE Tokyo Section

Pulse oximetry, a non-invasive technique to measure blood oxygen saturation continuously and immediately without a blood sample, was introduced in 1972 by Takuo Aoyagi of Nihon Kohden Corporation. The company launched its OLV-5100 as the first ear pulse oximeter in 1975. Subsequent developments by others made pulse oximeters a reliable and affordable standard of care in hospitals, clinics, and homes.

Superconducting Magnet System for the Fermilab Tevatron Accelerator/Collider, 1973-1985: Batavia, Illinois, Dedicated 13 November 2017 - IEEE Chicago Section

The first large-scale use of superconducting magnets enabled the construction of the Tevatron. By 1985, the Tevatron achieved energy above 1 Tera electron-volt (TeV) in proton-antiproton collisions, making it the most powerful particle collider in the world until 2009. The Tevatron construction established the superconducting wire manufacturing infrastructure that made applications such as Magnetic Resonance Imaging (MRI) viable.

The First Two-Dimensional Nuclear Magnetic Resonance Image (MRI), 1973: Stony Brook, NY, Dedicated 5 September 2018 - IEEE Long Island Section

Researchers at Stony Brook University produced the first two-dimensional image using nuclear magnetic resonance in 1973.The proton distribution of the object, a test tube of water, was distinctly encoded using magnetic field gradients. This achievement was a major advance for MRI and paved the way for its worldwide usage as a noninvasive method to examine body tissue for disease detection.

Ethernet Local Area Network (LAN), 1973-1985: Palo Alto, CA, Dedicated 17 May 2024 - IEEE Santa Clara Valley Section

Ethernet wired LAN was invented at Xerox Palo Alto Research Center (PARC) in 1973, inspired by the ALOHAnet packet radio network and the ARPANET. In 1980, Xerox, DEC, and Intel published a specification for 10 Mbps Ethernet over coaxial cable that became the IEEE 802.3-1985 Standard. Later augmented for higher speeds, and twisted-pair, optical, and wireless media, Ethernet became ubiquitous in home, commercial, industrial, and academic settings worldwide.

Heavy Ion Accelerator Facility, 1973: Acton, Australia, Dedicated 26 February 2025 - IEEE Australian Capital Territory Section

Commissioned in 1973, the Heavy Ion Accelerator Facility (HIAF) has empowered leading-edge research in nuclear spectroscopy and structure, fission and fusion studies, transient fields and hyperfine interactions, and accelerator mass spectrometry. Using a 15 million volt tandem electrostatic accelerator and a 6 million volt linear accelerator, the HIAF has advanced our understanding of astrophysics, biomedicine, climate change, and the impact of nuclear fission products on the environment.

First 500 MeV Proton Beam from the TRIUMF Cyclotron, 1974: Vancouver, British Columbia, Canada, Dedicated 16 December 2010 - IEEE Vancouver Section

At 3:30 pm on 15 December 1974, the first 500 MeV proton beam was extracted from the TRIUMF cyclotron. Since then, TRIUMF has used proton beams from its cyclotron (and secondary beams of pions, muons, neutrons and radioactive ions produced in its experimental halls) to conduct pioneering studies that have advanced nuclear physics, particle physics, molecular and materials science, and nuclear medicine.

First Real-Time Speech Communication on Packet Networks, 1974 - 1982: Lexington, Massachusetts, U.S.A., Dedicated 8 December 2011 - IEEE Boston Section

In August 1974, the first real-time speech communication over a packet-switched network was demonstrated via ARPANET between MIT Lincoln Laboratory and USC Information Sciences Institute. By 1982, these technologies enabled Internet packet speech and conferencing linking terrestrial, packet radio, and satellite networks. This work in real-time network protocols and speech coding laid the foundation for voice-over-internet-protocol (VoIP) communications and related applications including Internet videoconferencing.

The CP/M Microcomputer Operating System, 1974: Pacific Grove, California, U.S.A., Dedicated 25 April 2014 - IEEE Santa Clara Valley Section

The CP/M Microcomputer Operating System, 1974Dr. Gary A. Kildall demonstrated the first working prototype of CP/M (Control Program for Microcomputers) in Pacific Grove in 1974. Together with his invention of the BIOS (Basic Input Output System), Kildall’s operating system allowed a microprocessor-based computer to communicate with a disk drive storage unit and provided an important foundation for the personal computer revolution.

Transmission Control Protocol (TCP) Enables the Internet, 1974: Stanford, CA, Dedicated 20 May 2024 - IEEE Santa Clara Valley Section

In May 1974, the IEEE Transactions on Communications scientific journal published “A Protocol for Packet Network Intercommunication.” Authored by Vinton Cerf and Robert Kahn, this paper described the Transmission Control Protocol (TCP) that supported the interconnection of multiple packet-switched networks into a network of networks. Split later into TCP and an Internet Protocol (IP), TCP and IP became core components of the Internet that DARPA launched operationally in 1983.

Line Spectrum Pair (LSP) for high-compression speech coding, 1975: Tokyo, Japan, Dedicated 22 May 2014 - IEEE Tokyo Section

Line Spectrum Pair, invented at NTT in 1975, is an important technology for speech synthesis and coding. A speech synthesizer chip was designed based on Line Spectrum Pair in 1980. In the 1990s, this technology was adopted in almost all international speech coding standards as an essential component and has contributed to the enhancement of digital speech communication over mobile channels and the Internet worldwide.

Gapless Metal Oxide Surge Arrester (MOSA) for electric power systems,1975: Tokyo, Japan, Dedicated 18 August 2014 - IEEE Tokyo Section

Gapless Metal Oxide Surge Arrester (MOSA) for electric power systems,1975 Meidensha Corporation developed MOSA and its mass production system by innovating on Panasonic Corporation’s ZnO varistor basic patent. MOSA dramatically raised performance levels against multiple lightning strikes and contamination and led to the UHV protective device development. This technology contributed to improving the safety and reliability of electric power systems and to establishing the international standards.

Handheld Digital Camera, 1975: Rochester, NY, Dedicated 26 April 2022 - IEEE Rochester Section

A self-contained portable digital camera was invented at an Eastman Kodak Company laboratory. It used movie camera optics, a charge-coupled device as an electronic light sensor, a temporary buffer of random-access memory, and image storage on a digital cassette. Subsequent commercial digital cameras using flash memory storage revolutionized how images are captured, processed, and shared, creating opportunities in commerce, education, and global communications.

Itaipu Hydroelectric Power Plant, 1975-1984: Hernandarias, Paraguay, Dedicated 27 March 2025 - IEEE Paraguay Section

Itaipu power plant construction began in 1975 as a joint Brazil-Paraguay venture. When power generation started in 1984, Itaipu set a world record for the single largest installed hydroelectric capacity (14 GW). For at least three decades, Itaipu produced more electricity annually than any other hydroelectric project. Linking power plants, substations, and transmission lines in both Brazil and Paraguay, Itaipu’s system provided reliable, affordable energy to consumers and industry.

Development of VHS, a World Standard for Home Video Recording, 1976: Tokyo, Japan, Dedicated 11 October 2006 - IEEE Tokyo Section

At the Yokohama Plant of Victor Company of Japan, Limited, a team of engineers headed by Shizuo Takano and Yuma Shiraishi developed VHS (Video Home System) format. They looked ahead to the need for home video tape recorders and embodied their idea in unique inventions. The first model JVC HR-3300 was announced on 9 September 1976. Their basic design with subsequent improvement gained wide customer acceptance. VHS became the world standard for home video tape recorders.

The Floating Gate EEPROM, 1976 - 1978: Milpitas, California, USA, Dedicated 20 August 2012 - IEEE Santa Clara Valley Section

From 1976-1978, at Hughes Microelectronics in Newport Beach, California, the practicality, reliability, manufacturability and endurance of the Floating Gate EEPROM -- an electrically erasable device using a thin gate oxide and Fowler-Nordheim tunneling for writing and erasing -- was proven. As a significant foundation of data storage in flash memory, this fostered new classes of portable computing and communication devices which allow ubiquitous personal access to data.

Lempel-Ziv Data Compression Algorithm, 1977: Haifa, Israel, Dedicated 1 September 2004 - IEEE Israel Section

The data compression algorithm developed at this site in 1977 by Abraham Lempel and Jacob Ziv became a basis for enabling data transmission via the internet in an efficient way. It contributed significantly in making the internet a global communications medium.

Vapor-phase Axial Deposition Method for Mass Production of High-quality Optical Fiber, 1977-1983: Kanagawa, Japan, Dedicated 21 May 2015 - IEEE Tokyo Section

In 1977, Dr. Tatsuo Izawa of Nippon Telegraph and Telephone Corp. (NTT) invented the vapor-phase axial deposition (VAD) method suitable for the mass production of optical fiber. NTT, Furukawa Electric, Sumitomo Electric, and Fujikura collaboratively investigated the fabrication process. The technology successfully shifted from research and development to commercialization. The VAD method contributed greatly to the construction of optical-fiber networks.

Perpendicular Magnetic Recording, 1977: Sendai, Japan, Dedicated 9 October 2023 - IEEE Sendai Section

In 1977, Professor Shunichi Iwasaki led his Tohoku University team in developing a magnetic recording system with a pole head writing on a cobalt-alloy, thin-film perpendicular medium having a soft magnetic underlayer. This medium and configuration enabled data recording densities beyond those possible with longitudinal recording. Since 2005, perpendicular magnetic recording has played a crucial role in the continued growth of magnetic storage device capacity.

Speak & Spell, the First Use of a Digital Signal Processing IC for Speech Generation, 1978: Dallas, Texas, U.S.A., Dedicated 15 October 2009 - IEEE Dallas Section

In December 1976, Richard Wiggins demonstrated the Speak & Spell concept to Paul Breedlove, Larry Brantingham and Gene Frantz in Texas Instruments' Dallas research laboratory. This group led the team that created Speak & Spell in April 1978. The key device was the industry's first digital signal processing integrated processor, the TMS5100. This innovation in audio processing began the huge digital signal processing consumer market.

First Digitally Processed Image from a Spaceborne Synthetic Aperture Radar, 1978: Richmond, BC, Dedicated 9 September 2014 - IEEE Vancouver Section

In November 1978, a team from MacDonald, Dettwiler and Associates Ltd. (MDA) became the first to use a digital processor to reconstruct an image from Seasat-A, the first civilian spaceborne synthetic aperture radar (SAR). MDA engineers subsequently developed three of the four most important SAR digital processing algorithms that replaced the optical processing methods used previously.

First Demonstration of a Fibre Bragg Grating, 1978: Ottawa, Ontario, Dedicated 11 August 2023 - IEEE Ottawa Section

In 1978, researchers at the Communications Research Centre Canada were the first to observe photo-induced change of refractive index in glass optical fibres and demonstrate writing permanent refractive index gratings that act as very selective optical filters. Fibre Bragg Gratings of this type are easily integrated into fibre optic systems and have revolutionized the design of optical communications and sensor systems.

Compact Disc Audio Player, 1979: Eindhoven, Netherlands, Dedicated 6 March 2009 - IEEE Benelux Section

On 8 March 1979, N.V. Philips' Gloeilampenfabrieken demonstrated for the international press a Compact Disc Audio Player. The demonstration showed that it is possible by using digital optical recording and playback to reproduce audio signals with superb stereo quality. This research at Philips established the technical standard for digital optical recording systems.

20-inch Diameter Photomultiplier Tubes, 1979 - 1987: Iwata City, Japan, Dedicated 5 November 2014 - IEEE Nagoya Section

Hamamatsu Photonics K.K. began developing 20-inch diameter photomultiplier tubes at Toyooka Factory in 1979 for a 3000-ton water-filled Cherenkov particle detector, Kamiokande-II, in response to a request by Professor Masatoshi Koshiba. 1071 PMTs on it collected photons induced in the water by the particles falling on it. Kamiokande-II detected a neutrino burst in the Supernova SN1987A in 1987, earning Professor Koshiba a Nobel Prize in 2002.

Amorphous Silicon Thin Film Field-Effect Transistor Switches for Liquid Crystal Displays, 1979: Dundee, Scotland, UK, Dedicated 5 April 2018 - IEEE United Kingdom and Ireland Section

A research team in the Physics department of Dundee University, Scotland demonstrated in 1979 that amorphous silicon field-effect transistors were able to switch liquid crystal arrays. Other semiconductor thin film materials had been found to be unsuitable for deposition on large area substrates. The invention laid the foundation for the commercial development of flat panel television displays.

HEMT, 1979: Kawasaki, Japan, Dedicated 18 December 2019 - IEEE Tokyo Section

The HEMT was the first transistor to incorporate an interface between two semiconductor materials with different energy gaps. HEMTs proved superior to previous transistor technologies because of their high mobility channel carriers, resulting in high speed and high frequency performance. They have been widely used in radio telescopes, satellite broadcasting receivers and cellular base stations, becoming a fundamental technology supporting the information and communication society.

1980-Present

International Standardization of G3 Facsimile, 1980: Yokosuka City, Kanagawa, Japan, Dedicated 5 April 2012 - IEEE Tokyo Section

This site commemorates the creation of the Modified READ two-dimensional coding for G3 facsimile developed through the careful collaboration of NTT and KDDI. Strong Japanese leadership with intense international discussion, testing, and cooperation produced the International Telecommunications Union G3 recommendation in 1980. This innovative and efficient standard enabled the worldwide commercial success of facsimile.

First RISC (Reduced Instruction-Set Computing) Microprocessor 1980-1982: Berkeley, California, U.S.A., Dedicated 12 February 2015 - IEEE Oakland-East Bay Section

UC Berkeley students designed and built the first VLSI reduced instruction-set computer in 1981. The simplified instructions of RISC-I reduced the hardware for instruction decode and control, which enabled a flat 32-bit address space, a large set of registers, and pipelined execution. A good match to C programs and the Unix operating system, RISC-I influenced instruction sets widely used today, including those for game consoles, smartphones and tablets.

Outdoor large-scale color display system, 1980: Nagasaki, Japan, Dedicated 7 March 2018 - IEEE Fukuoka Section

Mitsubishi Electric developed the world's first large-scale emissive color video display system and installed it at Dodger Stadium, Los Angeles, California in 1980. It achieved bright, efficient, high-quality moving images using matrix-addressed cathode-ray tubes (CRT) as pixels. With increased dimensions and resolution, the system has entertained and informed millions of people in sports facilities and public spaces worldwide.

MPD7720DSP, 1980: Kawasaki, Kanagawa, Japan, Dedicated 15 December 2020 - IEEE Tokyo Section

In 1980, NEC (formerly Nippon Electric Company) developed here the first commercially available, programmable digital signal processor chip, the μPD7720. Its novel bus structure, 250-nsec instruction cycle, and 16-bit multiplier enabled fast finite impulse response filtering and provided true real-time processing for complex systems. It accelerated the adoption of digital signal processing in communications and broadcasting.

Inverter-Driven Air Conditioner, 1980-1981: Tadehara, Fuji-Shi, Shizuoka-Ken, Japan, Dedicated 16 March 2021 - IEEE Nagoya Section

Toshiba developed and mass-produced the world’s first split-type air conditioners with inverter-driven compressors for commercial and residential applications in 1980 and 1981, respectively. Compact and robust inverters using power electronics technologies allowed variable-speed control of the compressors for optimized air-conditioning operations, with significantly improved comfort and energy efficiency. These innovations led to widespread use of inverter air conditioners across the world.

Origin of the IEEE 802 Family of Networking Standards, 1980-1999: Mountain View, CA, Dedicated 20 May 2024 - IEEE Santa Clara Valley Section

The necessity to standardize computer Local Area Networks (LANs) resulted in the IEEE Computer Society sponsoring LAN Standard Project 802 in 1980. Four 802 Working Groups formed by 1999 proved particularly successful and transformative: IEEE 802.1 (Bridging), IEEE 802.3 (Ethernet), IEEE 802.11 (Wi-Fi®), and IEEE 802.15 (Wireless Personal Area Networks). IEEE 802 standards defined ever-expanding networking speeds and features, thus enabling the seamless interconnection of computing devices worldwide.

16-bit Monolithic DAC, 1981: Tucson, Arizona, U.S.A., Dallas, Texas, U.S.A., Dedicated 6 December 2010 - IEEE Dallas, Tucson Section

World’s First Monolithic 16-Bit Digital-to-Analog Converter (DAC) for Digital Audio, 1981In early 1982, Burr-Brown Research Corporation, later part of Texas Instruments, Inc., demonstrated a 16-bit monolithic digital-to-analog converter. Coupled with earlier compact disc development by Philips and Sony, it enabled affordable high-quality compact disc players, helped transform music distribution and playback from analog phonograph records to digital compact discs, and ushered in digital media playback.

Map-Based Automotive Navigation System, 1981: Tokyo, Japan, Dedicated 2 March 2017 - IEEE Tokyo Section

The world’s first map-based automotive navigation system, ‘Honda Electro Gyrocator’, was released in 1981. This system was based on inertial navigation technology using mileage and gyro sensors. It pioneered the on-board display of the destination path of a moving vehicle on overlaying transparent road-map sheets, and contributed to the advancement of automotive navigation systems.

The Development of RenderMan® for Photorealistic Graphics, 1981-1988: Emeryville, CA, Dedicated 8 December 2023 - IEEE Oakland-East Bay Section

RenderMan® software revolutionized photorealistic rendering, significantly advancing the creation of 3D computer animation and visual effects. Starting in 1981, key inventions during its development at Lucasfilm and Pixar included shading languages, stochastic antialiasing, and simulation of motion blur, depth of field, and penumbras. RenderMan®’s broad film industry adoption following its 1988 introduction led to numerous Oscar®s for Best Visual Effects, and an Academy Award of Merit Oscar® for its developers.

Nobeyama 45-m Telescope, 1982: Osawa, Mitaka, Tokyo, Japan, Dedicated 14 June 2017 - IEEE Tokyo Section

In 1982, the Tokyo Astronomical Observatory in collaboration with Mitsubishi Electric Corporation completed the 45-m telescope as the world’s largest antenna for millimeter-wave radio astronomy. The 45-m telescope's innovative engineering contributed to the progress of radio astronomy by enabling high-resolution and high-sensitivity observations. Notable discoveries included new interstellar molecules and a black hole.

Human Rescue Enabled by Space Technology, 1982: Canada Aviation and Space Museum, Ottawa, Canada, Dedicated 9 September 2019 - IEEE Ottawa Section

On 9 September 1982 an aircraft crashed in the mountains of British Columbia. A Canadian ground station in Ottawa located the aircraft using the COSPAS-SARSAT satellite system. Search and rescue teams were dispatched and all on board were rescued. Since the first incident, many tens of thousands of lives have been saved around the world using this technology.

First Large-Scale Fingerprint ID, 1982: Minato-ku, Tokyo, Dedicated 15 December 2020 - IEEE Tokyo Section

NEC, formerly known as Nippon Electric Company, introduced the world's first large-scale automated fingerprint identification system (NEC AFIS) equipped with a latent fingerprint matching function in 1982. This was a powerful crime-solving tool capable of matching even fragmented latent fingerprints against a large database, a task that previously had been impossible. It enabled the world's police agencies to expedite searches for suspects, an efficiency that many public-safety experts valued.

Commercialization of Multilayer Ceramic Capacitors with Nickel Electrodes, 1982: Kyoto, Japan, Dedicated 8 March 2024 - IEEE Kansai Section

Murata Manufacturing Co., Ltd. commercialized Multilayer Ceramic Capacitors with Nickel Electrodes (Ni-MLCC) in 1982, of which it became a major manufacturer. Further innovations in capacitance enhancement, product miniaturization, and cost reduction made these ceramic capacitors widely used in computer and communication devices for industrial, medical, and consumer applications. Ubiquitous global applications of Ni- MLCC resulted in annual production of more than one trillion units in 2021.

First Direct Broadcast Satellite Service, 1984: Tokyo, Japan, Dedicated 18 November 2011 - IEEE Tokyo Section

NHK began the world's first direct broadcast satellite service in May, 1984. This was the culmination of eighteen years of research that included the development of an inexpensive low-noise receiver and investigations of rain attenuation in the 12 GHz band. RRL, NASDA, TSCJ, Toshiba Corporation, General Electric Company, and NASA participated with NHK to make satellite broadcasting to the home a practical reality.

The MU (Middle and Upper atmosphere) radar, 1984: Kyoto University, Koyama, Shigaraki-cho, Koka-city, Shiga, Japan, Dedicated 13 May 2015 - IEEE Kansai Section

In 1984, Kyoto University built the MU (Middle and Upper atmosphere) radar as the first large-scale MST (Mesosphere, Stratosphere, and Troposphere) radar with a two-dimensional active phased array antenna system, with the collaboration of Mitsubishi Electric Corporation. The MU radar enabled continuous and flexible observation of the atmosphere, and has contributed to the progress of atmospheric science and radar engineering.

Active Shielding of Superconducting Magnets, 1984-1989: Eynsham, Oxfordshire, United Kingdom, Dedicated 16 June 2022 - IEEE United Kingdom and Ireland Section

At this site, the first actively shielded superconducting magnets for diagnostic Magnetic Resonance Imaging (MRI) use were conceived, designed, and produced. Active shielding reduced the size, weight, and installed cost of MRI systems, allowing them to be more easily transported and advantageously located, thereby benefiting advanced medical diagnosis worldwide.

MPEG Multimedia Integrated Circuits, 1984-1993: Grenoble, France, Dedicated 28 September 2023 - IEEE France Section

Beginning in 1984, Thomson Semiconducteurs (now STMicroelectronics) developed multimedia integrated circuits, which accelerated Moving Picture Experts Group (MPEG) standards. By 1993, MPEG-2 integrated decoders -- including innovative discrete cosine transform (developed jointly with ENST, now Telecom ParisTech), bitstream decompression, on-the-fly motion compensation, and display unit -- were announced in one silicon die: the STi3500. Subsequent MPEG-2 worldwide adoption made compressed full-motion video and audio inexpensive and available for everyday use.

TRON Real-time Operating System Family, 1984: The University of Tokyo, Dedicated 14 October 2023 - IEEE Tokyo Section

In 1984, a computer architecture project team at the University of Tokyo began designing The Real-time Operating system Nucleus (TRON) OS family and helping external partners commercialize it. Specifications and sample source code were provided openly and freely, facilitating innovations by developers and users. TRON real-time OS family copies have been adopted worldwide in billions of embedded computer devices, including aerospace and industrial equipment, automotive systems, and home electronics.

Development of 193-nm Projection Photolithography, 1984-1996: Lexington, MA, Dedicated 2 February 2024 - IEEE Boston Section

MIT Lincoln Laboratory pioneered the research, development, and demonstration of 193-nm projection lithography. This technology became the dominant high-resolution patterning technique, enabling the continuous performance scaling of integrated circuits for decades. During 1984–1996, Lincoln Laboratory established an international research center with industrial partners and consortia to guide microelectronic chip manufacturing with 193-nm lithography, which paved the way for its widespread commercial adoption.

Toshiba T1100, a Pioneering Contribution to the Development of Laptop PC, 1985: Tokyo, Japan, Dedicated 29 October 2013 - IEEE Tokyo Section

Toshiba T1100, a Pioneering Contribution to the Development of Laptop PC, 1985The Toshiba T1100, an IBM PC compatible laptop computer that shipped in 1985, made an invaluable contribution to the development of the laptop PC and portable personal computers. With the T1100, Toshiba demonstrated and promoted the emergence and importance of true portability for PCs running packaged software, with the result that T1100 won acceptance not only among PC experts but by the business community.

Emergency Warning Code Signal Broadcasting System, 1985: Tokyo, Dedicated 11 May 2016 - IEEE Tokyo Section

NHK (Japan Broadcasting Corporation) began broadcasting emergency warning code signals in 1985. The system embedded signals within AM and FM radio broadcasts that provided reliable and prompt transmission of emergency warning information to the public. During the course of digital TV standardization, the warning codes were integrated into technical standards of international satellite and terrestrial broadcasting.

Multiple Technologies on a Chip, 1985: Agrate Brianza, Italy, Dedicated 18 May 2021 - IEEE Italy Section

SGS (now STMicroelectronics) pioneered the super-integrated silicon-gate process combining Bipolar, CMOS, and DMOS (BCD) transistors in single chips for complex, power-demanding applications. The first BCD super-integrated circuit, named L6202, was capable of controlling up to 60V-5A at 300 kHz. Subsequent automotive, computer, and industrial applications extensively adopted this process technology, which enabled chip designers flexibly and reliably to combine power, analog, and digital signal processing.

IEEE Standard 754 for Binary Floating-Point Arithmetic, 1985: Berkeley, CA, Dedicated 3 May 2023 - IEEE Oakland-East Bay Section

In 1978, faculty and students at U.C. Berkeley drafted what became IEEE Standard 754 for Binary Floating-Point Arithmetic. Inspired by ongoing collaboration with Intel, the proposal revolutionized numerical computing. Its carefully crafted arithmetic and standard data types promoted unprecedented software reliability and portability. By 1980, microprocessor companies were already implementing the proposal.

Fiber Optic Connectors, 1986: Hanabatake, Tsukuba-city, Ibaraki, Japan, Dedicated 5 March 2021 - IEEE Tokyo Section

In 1986, Nippon Telegraph and Telephone Corp. (NTT) invented the physical contact connection technology that advanced performance and reliability of fiber optic connectors. NTT developed Single-fiber Coupling (SC) and Multifiber Push-On (MPO) connectors; their compactness and simple push-pull operation were major advantages. Widely adopted by carriers and data centers since 1990, this technology facilitated the construction of systems for near light-speed, digital, global communications.

High-Temperature Superconductivity, 1987: Houston, TX, Dedicated 17 November 2014 - IEEE Houston Section

On this site in 1987, yttrium-barium-copper-oxide, YBa2Cu3O7, the first material to exhibit superconductivity at temperatures above the boiling point of liquid nitrogen (77k), was discovered. This ushered in an era of accelerated superconductor materials science and engineering research worldwide, and led to advanced applications of superconductivity in energy, medicine, communications, and transportation.

SPARC RISC Architecture, 1987: Santa Clara, California, U.S.A., Dedicated 13 February 2015 - IEEE Santa Clara Valley Section

Sun Microsystems introduced SPARC (Scalable Processor Architecture) RISC (Reduced Instruction-Set Computing) in 1987. Building upon UC Berkeley RISC and Sun compiler and operating system developments, SPARC architecture was highly adaptable to evolving semiconductor, software, and system technology and user needs. The architecture delivered the highest performance, scalable workstations and servers, for engineering, business, Internet, and cloud computing applications.

Superconductivity at 93 Kelvin, 1987: Huntsville, AL, Dedicated 19 August 2019 - IEEE Huntsville Section

On this site, a material consisting of yttrium, barium, copper, and oxygen was first conceived, synthesized, tested, and -- on 29 January 1987 -- found to exhibit stable and reproducible superconductivity at 93 Kelvin. This marked the first time the phenomenon had been unambiguously achieved above 77 Kelvin, the boiling point of liquid nitrogen, thus enabling more practical and widespread use of superconductors.

WaveLAN, Precursor of Wi-Fi, 1987: Nieuwegein, Netherlands, Dedicated 29 October 2019 - IEEE Benelux Section

In November 1987, a group of Dutch engineers in Nieuwegein demonstrated a method for significantly increasing the data rate achievable under new regulations that permitted license-exempt short-range wireless data communications in certain frequency bands. Their development of WaveLAN technology led directly to formation of the IEEE 802.11 Working Group for Wireless Local Area Networks and establishment of the now ubiquitous Wi-Fi industry.

MTI Portable Satellite Communication Terminals, 1987-1995: Hsinchu, Taiwan, Dedicated 6 December 2023 - IEEE Taipei Section

Microelectronics Technology Incorporation (MTI) pioneered the development of transportable satellite communication terminals suitable for use in extreme environments. Offering global voice, telex, and data connectivity in a remarkably compact form factor, their technology helped rescuers bring aid to disaster zones, reporters communicate news from war zones, and expeditions explore remote mountains and deserts.

Sharp 14-inch Thin-Film-Transistor Liquid-Crystal Display (TFT-LCD) for TV, 1988: Nara, Japan, Dedicated 10 June 2014 - IEEE Kansai Section

Sharp demonstrated a fourteen-inch TFT-LCD for TV in 1988 when the display size of the mass-produced TFT-LCD was three inches. The high display quality in Cathode Ray Tube size convinced other electronic companies to join the infant TFT-LCD industry aimed at emerging full-color portable PCs. Two decades later, TFT-LCDs replaced CRTs, making the vision of RCA's LCD group in the 1960s a reality.

Virginia Smith High-Voltage Direct-Current Converter Station, 1988: Lakewood, Colorado, Dedicated 21 May 2015 - IEEE Denver Section

Built by Siemens, owned and operated by Western Area Power Administration (US DOE), the 200 MW HVDC Virginia Smith Converter Station near Sidney, Nebraska, connected the eastern and western U.S. grids. Its core technology is an all solid-state converter with integrated steady-state, dynamic, and transient voltage control up to its full rating. The station was an important advance in HVDC technology and cost-effectiveness.

Trans-Atlantic Telephone Fiber-Optic Submarine Cable (TAT-8), 1988: AT&T Labs, 200 S Laurel Ave., Middletown, NJ 07748, U.S.A., Dedicated 19 May 2016 - IEEE New Jersey Coast Section

TAT-8, the first fiber-optic cable to cross an ocean, entered service 14 December 1988. AT&T, British Telecom, and France Telecom led the consortium that built TAT-8, which spanned a seabed distance of 5,846 km between North America and Europe. AT&T Bell Laboratories developed the foundational technologies: 1.3 micron fiber, cable, splicing, laser detector, and 280 Mbps repeater for 40,000 telephone-call capacity. Bell Labs led the integration at Freehold, New Jersey.

First Robotic Control from Human Brain Signals, 1988: Skopje, Macedonia, Dedicated 10 October 2023 - IEEE North Macedonia Section

In 1988, in the Laboratory of Intelligent Machines and Bioinformation Systems, human brain signals controlled the movement of a physical object (a robot) for the first time worldwide. This linked electroencephalogram (EEG) signals collected from a brain with robotics research, opening a new channel for communication between humans and machines. EEG-controlled devices (wheelchairs, exoskeletons, etc.) have benefitted numerous users and expanded technology's role in modern society.

Laser Ionization Mass Spectrometer, 1988: Kyoto, Japan, Dedicated 15 November 2024 - IEEE Kansai Section

In 1988, Shimadzu Corporation released a mass spectrometer that could measure macromolecules whose molar mass was at least 50,000 grams per mole. As the world's first commercially available device that applied soft laser desorption ionization techniques, it led to new pharmaceuticals and diagnostic capabilities in the fields of molecular biology and medicine. Koichi Tanaka, the key developer of this technology, shared the 2002 Nobel Prize in Chemistry.

Development of CDMA for Cellular Communications, 1989: San Diego, CA, Dedicated 7 November 2017 - IEEE San Diego Section

On 7 November 1989, Qualcomm publicly demonstrated a digital cellular radio system based on Code Division Multiple Access (CDMA) spread spectrum technology, which increased capacity, improved service quality, and extended battery life. This formed the basis for IS-95 second-generation standards and third-generation broadband standards that were applied to cellular mobile devices worldwide.

The Pioneering TRON Intelligent House, 1989: Tokyo, Japan, Dedicated 28 November 2024 - IEEE Tokyo Section

The first TRON Intelligent House was based on the concept of a Highly Functionally Distributed System (HFDS) as proposed in 1987. Built in Tokyo in 1989 using about 1,000 networked computers to implement Internet of Things (IoT), its advanced human-machine interface (HMI) provided “ubiquitous computing” before that term was coined in 1991. Feedback by TRON’s residents helped mature HFDS design, showing how to live in an IoT environment.

Giant Metrewave Radio Telescope, 1994: Pune, India, Dedicated 30 March 2021 - IEEE Pune Section

GMRT, consisting of thirty antennas of 45 m diameter each, spanning 25 km near Pune, India, is one of the largest and most sensitive low frequency (110–1460 MHz) radio telescopes in the world. It pioneered new techniques in antenna design, receiver systems, and signal transport over optical fibre. GMRT has produced important discoveries in domains such as pulsars, supernovae, galaxies, quasars, and cosmology, greatly enhancing our understanding of the Universe.

QR (Quick Response) Code, 1994: Kariya, Aichu, Japan, Dedicated 26 September 2022 - IEEE Nagoya Section

DENSO developed two-dimensional QR Code technology, inexpensive machine-readable optical labels that improved on barcoding by conveying larger amounts of data more quickly. Worldwide businesses soon adopted QR Codes to improve manufacturing, logistics, and management. Camera-equipped mobile phones brought QR Codes into advertising, design, and widespread applications such as electronic payments, giving consumers efficient new ways to access digital information.

PageRank and the Birth of Google, 1996-1998: Stanford, CA, Dedicated 20 May 2024 - IEEE Santa Clara Valley Section

Invented in 1996, the PageRank citation algorithm was the basis of the search engine that launched Google’s founding in 1998. PageRank interpreted hyperlinks as referrals, posited that a high-quality page should have high-quality pages providing referrals, and recursively produced useful ranking scores for all indexed pages. This recursive quality evaluation technique became widely adopted by other search engines, as well as social networks, peer-to-peer systems, and numerous other services.

Large-Scale Commercialization of a CDMA Cellular Communication System, 1996: Seoul, South Korea, Dedicated 10 June 2024 - IEEE Seoul Section

In 1996, South Korea inaugurated the world’s first successful CDMA commercial service, validating large-scale deployment of a digital technology with superior performance over analog mobile networks. Accomplishments of SK Telecom, ETRI, Samsung Electronics, LG Electronics, and Hyundai Electronics in developing equipment for this second-generation system led to many mobile operators around the world adopting CDMA, and the technology becoming the basis of the worldwide, third-generation of mobile communications.

Toyota Prius, the World's First Mass-Produced Hybrid Vehicle, 1997: Aichi, Japan, Dedicated 30 October 2024 - IEEE Nagoya Section

In 1997, Toyota Motor Corporation developed the world's first mass-produced hybrid vehicle, the Toyota Prius, which used both an internal combustion engine and two electric motors. This vehicle achieved revolutionary fuel efficiency by recovering and reusing energy previously lost while driving. Its success helped popularize hybrid vehicles internationally, advanced the technology essential for electric powertrains, contributed to the reduction of CO2 emissions, and influenced the design of subsequent electrified vehicles.

Special Citations

Nikola Tesla (1856-1943), Electrical Pioneer (Special Citation): Belgrade, Serbia, Dedicated 1 October 2006 - IEEE Serbia and Montenegro Section

On the 150th anniversary of his birth, the IEEE is pleased to recognize the seminal work of Nikola Tesla in the field of electrical engineering. Among his many accomplishments, those that stand out are his innovative contributions to the applications of polyphase current to electric power systems, his pioneering work with electromagnetic waves, and his experiments with very high voltages. The Tesla Museum in Beograd is to be commended for its successful efforts to preserve artifacts and documents related to Tesla and to make them accessible to scholars throughout the world.

Commonwealth Solar - Mount Stromlo Observatory, 1924 (Special Citation): Weston Creek, Australian Capital Territory, Dedicated 6 September 2024 - IEEE Australian Capital Territory Section

Since 1924, the Commonwealth Solar Observatory has preserved the history of solar observation, optical munitions manufacturing, optical stellar research, and world-class development of astrophysics instrumentation in Australia. The Observatory has also become a major partner in developing the Australian space industry, including the design and supply of components for the world’s largest optical telescopes, while simultaneously furthering public education.

IEEE Special Citation Computer History Museum, 1979: Mountain View, CA, Dedicated 29 October 2015 - IEEE Santa Clara Valley Section

The Computer History Museum's mission is to preserve and present for posterity the artifacts and stories of the Information Age. The museum houses the world's largest collection of computers and related software, documents, and visual media. Public exhibits celebrate the rich history of computing, aided by a speaker series, education activities, historical restorations, and research programs.

Special Citation Heinz Nixdorf Museum, 1996: Paderborn, Germany, Dedicated 23 October 2021 - IEEE Germany Section

One of the largest computer museums in the world, the Heinz Nixdorf MuseumsForum presents 5000 years of computing history from the emergence of numbers and lettering circa 3000 B.C.E. to the modern digital age. Through presentations, workshops, seminars, and exhibitions, it has provided a broad audience with the insights and perspectives required to navigate a world that is increasingly shaped by digital technology.