TestMilestones

 Year of AchievementDate DedicatedIEEE RegionsIEEE SectionDedication #GeoLoc
16-bit Monolithic DAC, 198119816 December 20105Dallas107
16-bit Monolithic DAC, 198132° 13' 2", -110° 52' 40"
20-inch Diameter Photomultiplier Tubes, 1979 - 198719795 November 201410Nagoya147
20-inch Diameter Photomultiplier Tubes, 1979 - 198734° 48' 52", 137° 50' 14"
Adams Hydroelectric Generating Plant, 1895189521 June 19901Buffalo17
Adams Hydroelectric Generating Plant, 189543° 4' 54", -79° 2' 35"
Alexanderson Radio Alternator, 1904190420 February 19921Schenectady22
Alexanderson Radio Alternator, 190442° 48' 36", -73° 57' 6"
Alouette-ISIS Satellite Program, 196219621 May 19937Ottawa23
Alouette-ISIS Satellite Program, 196245° 20' 42", -75° 52' 58"
Alternating-Current Electrification of the New York, New Haven & Hartford Railroad, 1907190722 May 19821Connecticut3
Alternating-Current Electrification of the New York, New Haven & Hartford Railroad, 190741° 1' 49", -73° 35' 56"
Alternating Current Electrification, 188618862 October 20041Berkshire51
Alternating Current Electrification, 188642° 11' 54", -73° 21' 40"
American Standard Code for Information Interchange ASCII, 1963196319 May 20161New Jersey Coast164
American Standard Code for Information Interchange ASCII, 196340° 23' 50", -74° 8' 16"
Ames Hydroelectric Generating Plant, 189118911 July 19885Pikes Peak14
Ames Hydroelectric Generating Plant, 189137° 51' 56", -107° 52' 54"
Amorphous Silicon Thin Film Field-Effect Transistor Switches for Liquid Crystal Displays, 197919795 April 20188United Kingdom and Ireland188
Amorphous Silicon Thin Film Field-Effect Transistor Switches for Liquid Crystal Displays, 197956° 27' 30", -2° 58' 56"
Ampex Videotape Recorder, 1956195610 June 20166Santa Clara Valley166
Ampex Videotape Recorder, 195637° 26' 31", -122° 8' 35"
Apollo Guidance Computer, 1962-1972196213 December 20111Boston118
Apollo Guidance Computer, 1962-197242° 21' 53", -71° 5' 27"
Atanasoff-Berry Computer, 193919391 April 19904Central Iowa18
Atanasoff-Berry Computer, 193942° 1' 26", -93° 38' 21"
Bell Telephone Laboratories, Inc., 1925-1983192518 December 20141North Jersey151
Bell Telephone Laboratories, Inc., 1925-198340° 41' 4", -74° 24' 6"
Benjamin Franklin's work in London, 1757-1775175731 March 20038United Kingdom and Ireland47
Benjamin Franklin's work in London, 1757-177551° 30' 27", -0° 7' 30"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893189312 April 201410Kansai138
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893#GS_Yuasa_International_Ltd.,_Kyoto_Head_Office,_Global_Technical_Head_Quarters34° 58' 40", 135° 43' 24"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893#GS_Yuasa_International_Ltd.,_Tokyo_Head_Office35° 39' 27", 139° 45' 9"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893#Panasonic_Corporation,_Automotive_and_Industrial_Systems_Company_Head_Office34° 44' 21", 135° 34' 22"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893#Panasonic_Corporation,_Energy_Device_Business_Division_Head_Office34° 43' 40", 135° 34' 0"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 1893#Panasonic_Corporation,_Portable_Rechargeable_Battery_Business_Group_Head_Office34° 20' 38", 134° 51' 38"
Birth and Growth of Primary and Secondary Battery Industries in Japan, 189334° 58' 52", 135° 43' 41"
Birthplace of Silicon Valley, 1956195615 August 20186Santa Clara Valley189
Birthplace of Silicon Valley, 195637° 24' 18", -122° 6' 39"
Birthplace of the Bar Code, 1948194822 October 20122Philadelphia130
Birthplace of the Bar Code, 194839° 57' 18", -75° 11' 11"
Birthplace of the Internet, 1969196929 October 20096Coastal Los Angeles96
Birthplace of the Internet, 196934° 4' 16", -118° 26' 28"
Book “Experiments and Observations on Electricity” by Benjamin Franklin, 175117517 August 20092Philadelphia87
Book “Experiments and Observations on Electricity” by Benjamin Franklin, 1751#American_Philosophical_Society_Library,_Philadelphia,_PA.39° 56' 56", -75° 8' 51"
Book “Experiments and Observations on Electricity” by Benjamin Franklin, 175139° 56' 56", -75° 8' 51"
CERN Experimental Instrumentation, 1968196826 September 20058France63
CERN Experimental Instrumentation, 196846° 13' 42", 6° 4' 20"
Callan's Pioneering Contributions to Electrical Science and Technology, 183618365 September 20068United Kingdom and Ireland66
Callan's Pioneering Contributions to Electrical Science and Technology, 183653° 22' 54", -6° 35' 26"
Chivilingo Hydroelectric Plant, 1897189724 October 20019Chile36
Chivilingo Hydroelectric Plant, 1897-37° 5' 26", -73° 9' 35"
Code-breaking at Bletchley Park during World War II, 1939-194519391 April 20038United Kingdom and Ireland49
Code-breaking at Bletchley Park during World War II, 1939-194552° 0' 21", -0° 43' 40"
Commercialization and Industrialization of Photovoltaic Cells, 195919599 April 201010Kansai99
Commercialization and Industrialization of Photovoltaic Cells, 195934° 28' 33", 135° 44' 29"
Compact Disc Audio Player, 197919796 March 20098Benelux83
Compact Disc Audio Player, 197951° 24' 55", 5° 27' 26"
County Kerry Transatlantic Cable Stations, 1866186613 July 20008United Kingdom and Ireland32
County Kerry Transatlantic Cable Stations, 186651° 49' 37", -10° 10' 19"
Dadda's Multiplier, 1965196526 September 20168Italy171
Dadda's Multiplier, 196545° 28' 43", 9° 13' 57"
Decew Falls Hydro-Electric Plant, 189818982 May 20047Hamilton53
Decew Falls Hydro-Electric Plant, 189843° 6' 59", -79° 14' 55"
Demonstration of Practical Telegraphy, 183818387 May 19881North Jersey13
Demonstration of Practical Telegraphy, 183840° 48' 43", -74° 28' 52"
Development of CDMA for Cellular Communications, 198919897 November 20176San Diego184
Development of CDMA for Cellular Communications, 198932° 53' 43", -117° 11' 52"
Development of Electronic Television, 1924-1941192412 November 200910Nagoya85
Development of Electronic Television, 1924-194134° 43' 31", 137° 43' 3"
Development of Ferrite Materials and Their Applications, 1930-1945193013 October 200910Tokyo88
Development of Ferrite Materials and Their Applications, 1930-194535° 36' 24", 139° 41' 5"
Development of Information Theory, 1939-1967193917 May 20161Boston163
Development of Information Theory, 1939-196742° 21' 42", -71° 5' 26"
Development of VHS, a World Standard for Home Video Recording, 1976197611 October 200610Tokyo72
Development of VHS, a World Standard for Home Video Recording, 197635° 13' 28", 139° 42' 22"
Development of the HP-35, the First Handheld Scientific Calculator, 1972197214 April 20096Santa Clara Valley82
Development of the HP-35, the First Handheld Scientific Calculator, 197237° 24' 42", -122° 8' 52"
Directive Short Wave Antenna, 192419241 June 199510Sendai26
Directive Short Wave Antenna, 192438° 16' 18", 140° 51' 33"
Discovery of Radioconduction by Edouard Branly, 1890189023 September 20108France102
Discovery of Radioconduction by Edouard Branly, 189048° 50' 56", 2° 19' 47"
Discovery of Superconductivity, 191119118 April 20118Benelux112
Discovery of Superconductivity, 191152° 9' 22", 4° 29' 26"
Early Developments in Remote-Control, 1901190115 March 20078Spain73
Early Developments in Remote-Control, 190140° 26' 38", -3° 43' 38"
Early Swiss Wireless Experiments, 1897189726 September 20038Switzerland46
Early Swiss Wireless Experiments, 189746° 7' 18", 7° 1' 18"
Eel River High Voltage Direct Current Converter Station, 1972197224 February 20117New Brunswick109
Eel River High Voltage Direct Current Converter Station, 197248° 0' 38", -66° 22' 26"
Electric Fire Alarm System, 185218521 October 20041Boston50
Electric Fire Alarm System, 185242° 20' 38", -71° 5' 27"
Electric Lighting Of The Kingdom of Hawaii 1886-1888188623 March 20186Hawaii187
Electric Lighting Of The Kingdom of Hawaii 1886-188821° 18' 24", -157° 51' 32"
Electronic Numerical Integrator and Computer, 194619461 September 19872Philadelphia12
Electronic Numerical Integrator and Computer, 194639° 57' 10", -75° 11' 24"
Electronic Quartz Wristwatch, 1969196925 November 200410Tokyo56
Electronic Quartz Wristwatch, 196935° 42' 48", 139° 48' 33"
Electronic Technology for Space Rocket Launches, 1950-196919501 February 20013Canaveral42
Electronic Technology for Space Rocket Launches, 1950-196928° 31' 24", -80° 40' 55"
Emergency Warning Code Signal Broadcasting System, 1985198511 May 201610Tokyo162
Emergency Warning Code Signal Broadcasting System, 198535° 38' 8", 139° 36' 57"
Enrico Fermi's Major Contribution to Semiconductor Statistics, 1924-192619245 December 20158Italy160
Experimental Breeder Reactor I, 195119514 June 20046Eastern Idaho55
Experimental Breeder Reactor I, 195143° 31' 58", -112° 56' 34"
FM Police Radio Communication, 194019401 June 19871Connecticut11
FM Police Radio Communication, 194041° 45' 35", -72° 40' 55"
First 500 MeV Proton Beam from the TRIUMF Cyclotron, 1974197416 December 20107Vancouver108
First 500 MeV Proton Beam from the TRIUMF Cyclotron, 197449° 14' 52", -123° 13' 46"
First 735 kV AC Transmission System, 196519651 November 20057Quebec62
First 735 kV AC Transmission System, 196545° 30' 29", -73° 33' 44"
First Atomic Clock, 194819488 August 20172Washington181
First Atomic Clock, 194838° 56' 32", -77° 3' 45"
First Blind Takeoff, Flight and Landing, 1929192924 September 20141Long Island145
First Blind Takeoff, Flight and Landing, 192940° 43' 41", -73° 35' 51"
First Breaking of Enigma Code by the Team of Polish Cipher Bureau, 1932-193919325 August 20148Poland142
First Breaking of Enigma Code by the Team of Polish Cipher Bureau, 1932-193952° 13' 17", 21° 0' 53"
First Central Station in South Carolina, 1882188224 July 19863Coastal South Carolina8
First Central Station in South Carolina, 188232° 46' 40", -79° 56' 0"
First Digitally Processed Image from a Spaceborne Synthetic Aperture Radar, 197819789 September 20147Vancouver144
First Digitally Processed Image from a Spaceborne Synthetic Aperture Radar, 197849° 10' 31", -123° 4' 14"
First Direct Broadcast Satellite Service, 1984198418 November 201110Tokyo116
First Direct Broadcast Satellite Service, 198435° 38' 14", 139° 36' 31"
First Distant Speech Transmission in Canada, 187618764 May 20087Hamilton75
First Distant Speech Transmission in Canada, 187643° 11' 38", -80° 23' 3"
First Exploration and Proof of Liquid Crystals, 1889188911 October 20178Germany183
First Exploration and Proof of Liquid Crystals, 188949° 0' 34", 8° 24' 44"
First External Cardiac Pacemaker, 195019501 September 20097Toronto95
First External Cardiac Pacemaker, 195043° 39' 37", -79° 23' 22"
First Generation and Experimental Proof of Electromagnetic Waves, 1886-188818865 December 20148Germany150
First Generation and Experimental Proof of Electromagnetic Waves, 1886-188849° 0' 34", 8° 24' 44"
First Intelligible Voice Transmission over Electric Wire, 1876187610 March 20061Boston67
First Intelligible Voice Transmission over Electric Wire, 187642° 21' 34", -71° 3' 29"
First Millimeter-wave Communication Experiments by J.C. Bose, 1894-96189415 September 201210Kolkata128
First Millimeter-wave Communication Experiments by J.C. Bose, 1894-9622° 34' 32", 88° 21' 49"
First Operational Use Of Wireless Telegraphy, 1899-1902189929 September 19998South Africa29
First Operational Use Of Wireless Telegraphy, 1899-1902-33° 58' 44", 18° 28' 56"
First Optical Fiber Laser and Amplifier, 1961-1964196126 October 20121Worcester County131
First Optical Fiber Laser and Amplifier, 1961-196442° 4' 30", -72° 1' 36"
First Practical Field Emission Electron Microscope, 1972197231 January 201210Tokyo119
First Practical Field Emission Electron Microscope, 197235° 42' 42", 139° 28' 12"
First Public Demonstration of Television, 1926192626 January 20178United Kingdom and Ireland172
First Public Demonstration of Television, 192651° 30' 48", -0° 7' 52"
First RISC (Reduced Instruction-Set Computing) Microprocessor 1980-1982198012 February 20156Oakland-East Bay152
First RISC (Reduced Instruction-Set Computing) Microprocessor 1980-198237° 52' 33", -122° 15' 32"
First Radio Astronomical Observations Using Very Long Baseline Interferometry, 1967196725 September 20107Vancouver106
First Radio Astronomical Observations Using Very Long Baseline Interferometry, 196749° 19' 15", -119° 37' 13"
First Real-Time Speech Communication on Packet Networks, 1974 - 198219748 December 20111Boston117
First Real-Time Speech Communication on Packet Networks, 1974 - 198242° 27' 31", -71° 15' 49"
First Semiconductor Integrated Circuit (IC), 1958195815 October 20095Dallas90
First Semiconductor Integrated Circuit (IC), 195832° 55' 30", -96° 45' 24"
First Studies on Ring Armature for Direct-Current Dynamos, 1860-186318604 December 20188Italy193
First Studies on Ring Armature for Direct-Current Dynamos, 1860-186343° 43' 16", 10° 23' 23"
First Technical Meeting of the American Institute of Electrical Engineers, 1884188415 December 20132Philadelphia136
First Technical Meeting of the American Institute of Electrical Engineers, 188439° 57' 29", -75° 10' 21"
First Television Broadcast in Western Canada, 195319536 November 20107Vancouver104
First Television Broadcast in Western Canada, 1953#CBC_Broadcasting_Site,_Vancouver,_Canada49° 21' 13", -122° 57' 24"
First Television Broadcast in Western Canada, 195349° 21' 49", -122° 57' 24"
First Transatlantic Reception of a Television Signal via Satellite, 196219621 July 20028France44
First Transatlantic Reception of a Television Signal via Satellite, 196248° 46' 26", -3° 31' 2"
First Transatlantic Television Signal via Satellite, 196219621 July 20028United Kingdom and Ireland44
First Transatlantic Television Signal via Satellite, 196250° 3' 24", -5° 11' 7"
First Transatlantic Transmission of a Television Signal via Satellite, 196219621 July 20021Maine44
First Transatlantic Transmission of a Television Signal via Satellite, 196244° 56' 20", -70° 45' 0"
First Transpacific Reception of a Television (TV) Signal via Satellite, 1963196323 November 200910Tokyo92
First Transpacific Reception of a Television (TV) Signal via Satellite, 196336° 41' 51", 140° 42' 32"
First Wearable Cardiac Pacemaker, 1957-195819571 October 19994Twin Cities31
First Wearable Cardiac Pacemaker, 1957-195844° 56' 20", -93° 19' 18"
First Wireless Radio Broadcast by Reginald A. Fessenden, 1906190613 September 20081Boston78
First Wireless Radio Broadcast by Reginald A. Fessenden, 190642° 4' 55", -70° 38' 27"
First Working Laser, 1960196023 November 20106Metropolitan Los Angeles105
First Working Laser, 196034° 2' 36", -118° 41' 46"
Fleming Valve, 190419041 July 20048United Kingdom and Ireland54
Fleming Valve, 190451° 31' 23", -0° 7' 54"
French Transatlantic Telegraph Cable of 189818986 September 20181Providence192
French Transatlantic Telegraph Cable of 189841° 47' 16", -69° 59' 15"
Gapless Metal Oxide Surge Arrester (MOSA) for electric power systems,1975197518 August 201410Tokyo143
Gapless Metal Oxide Surge Arrester (MOSA) for electric power systems,197535° 38' 16", 139° 42' 55"
Georgetown Steam Hydro Generating Plant, 1900190031 July 19995Denver28
Georgetown Steam Hydro Generating Plant, 190039° 42' 23", -105° 41' 53"
Germany’s First Broadcast Transmission from the Radio Station Königs Wusterhausen, 1920192016 July 20168Germany168
Germany’s First Broadcast Transmission from the Radio Station Königs Wusterhausen, 192052° 18' 16", 13° 37' 15"
Gotland High Voltage Direct Current Link, 1954195415 May 20178Sweden177
Gotland High Voltage Direct Current Link, 195457° 35' 16", 18° 11' 41"
Grand Central Terminal Electrification, 1906-1913190615 June 20161New York167
Grand Central Terminal Electrification, 1906-191340° 45' 10", -73° 58' 38"
Grumman Lunar Module, 1962-1972196220 July 20111Long Island115
Grumman Lunar Module, 1962-197240° 45' 6", -73° 30' 7"
Harvard Mark 1 Computer, 1944 - 195942° 22' 35", -71° 7' 0"
High-Temperature Superconductivity, 1987198717 November 20145Houston149
High-Temperature Superconductivity, 198729° 43' 23", -95° 20' 47"
IBM Thomas J. Watson Research Center, 1960 - 1984196016 October 20091New York91
IBM Thomas J. Watson Research Center, 1960 - 198441° 12' 58", -73° 48' 22"
IEEE Special Citation Computer History Museum, 1979197929 October 20156Santa Clara Valley159
Inception of the ARPANET, 1969196916 September 20096Santa Clara Valley97
Inception of the ARPANET, 196937° 27' 33", -122° 10' 27"
Interactive Video Games, 1966196621 September 20151New Hampshire158
Interactive Video Games, 196642° 45' 51", -71° 27' 29"
International Standardization of G3 Facsimile, 198019805 April 201210Tokyo120
International Standardization of G3 Facsimile, 1980#KDDI_R&D_Laboratories_Inc.,_Kamifukuoka-city,_Saitama_Japan35° 51' 42", 139° 38' 44"
International Standardization of G3 Facsimile, 198035° 16' 53", 139° 40' 20"
Introduction of the Apple II Computer: 1977-197837° 19' 54", -122° 1' 49"
Invention of Holography, 1947194712 June 20138United Kingdom and Ireland133
Invention of Holography, 194751° 29' 56", -0° 10' 28"
Invention of Public-key Cryptography, 1969 - 197519695 October 20108United Kingdom and Ireland103
Invention of Public-key Cryptography, 1969 - 197551° 54' 4", -2° 4' 40"
Invention of Stereo Sound Reproduction, 193119311 April 20158United Kingdom and Ireland154
Invention of Stereo Sound Reproduction, 193151° 31' 56", -0° 10' 41"
Invention of a Temperature-Insensitive Quartz Oscillation Plate, 193319336 March 201710Tokyo175
Invention of a Temperature-Insensitive Quartz Oscillation Plate, 193335° 36' 25", 139° 41' 5"
Invention of the First Transistor at Bell Telephone Laboratories, Inc., 194719478 December 20091North Jersey89
Invention of the First Transistor at Bell Telephone Laboratories, Inc., 194740° 41' 3", -74° 24' 4"
Keage Power Station: The Japan’s First Commercial Hydroelectric Plant, 1890-1897189011 September 201610Kansai169
Keage Power Station: The Japan’s First Commercial Hydroelectric Plant, 1890-189735° 0' 37", 135° 47' 18"
Krka-Šibenik Electric Power System, 189518955 July 20138Croatia134
Krka-Šibenik Electric Power System, 189543° 48' 17", 15° 57' 48"
Kurobe River No. 4 Hydropower Plant, 1956-6319569 April 201010Kansai98
Kurobe River No. 4 Hydropower Plant, 1956-6336° 33' 59", 137° 39' 44"
Landing of the Transatlantic Cable, 1866186615 June 19857Newfoundland-Labrador5
Landing of the Transatlantic Cable, 186647° 52' 14", -53° 21' 54"
Largest Private (dc) Generating Plant in the U.S.A., 1929192925 September 20081New York79
Largest Private (dc) Generating Plant in the U.S.A., 192940° 45' 8", -73° 59' 36"
Lempel-Ziv Data Compression Algorithm, 197719771 September 20048Israel57
Lempel-Ziv Data Compression Algorithm, 197732° 48' 0", 35° 0' 0"
Line Spectrum Pair (LSP) for high-compression speech coding, 1975197522 May 201410Tokyo140
Line Spectrum Pair (LSP) for high-compression speech coding, 197535° 43' 13", 139° 33' 44"
Liquid Crystal Display, 1968196830 September 20061Princeton/Central Jersey71
Liquid Crystal Display, 196840° 19' 54", -74° 37' 54"
Long-Range Shortwave Voice Transmissions from Byrd's Antarctic Expedition, 193419341 February 20014Cedar Rapids38
Long-Range Shortwave Voice Transmissions from Byrd's Antarctic Expedition, 193442° 1' 42", -91° 38' 19"
Loran, 1940 - 1946194027 June 20121Boston123
Loran, 1940 - 194642° 21' 42", -71° 5' 26"
MIT Radiation Laboratory, 1940-194519401 October 19901Boston19
MIT Radiation Laboratory, 1940-194542° 22' 28", -71° 6' 21"
Mainline Electrification of the Baltimore and Ohio Railroad, 1895189521 June 20122Baltimore122
Mainline Electrification of the Baltimore and Ohio Railroad, 189539° 17' 7", -76° 38' 5"
Manufacture of Transistors, 195119511 April 19892Lehigh Valley15
Manufacture of Transistors, 195140° 37' 22", -75° 27' 4"
Map-Based Automotive Navigation System, 198119812 March 201710Tokyo174
Map-Based Automotive Navigation System, 198136° 31' 37", 140° 13' 36"
Marconi's Early Experiments in Wireless Telegraphy, 1895189529 April 20118Italy113
Marconi's Early Experiments in Wireless Telegraphy, 189544° 25' 53", 11° 16' 2"
Maxwell's Equations, 1860-1871186013 August 20098United Kingdom and Ireland86
Maxwell's Equations, 1860-1871#Castle_Douglas,_Kirkcudbrightshire,_Scotland55° 1' 57", -3° 56' 43"
Maxwell's Equations, 1860-187151° 30' 43", -0° 7' 0"
Mercury Spacecraft MA-6, 1962196224 February 20115Saint Louis110
Mercury Spacecraft MA-6, 196238° 44' 59", -90° 20' 50"
Merrill Wheel-Balancing System, 194519451 September 19995Denver30
Merrill Wheel-Balancing System, 194539° 44' 30", -105° 5' 1"
Mill Creek No. 1 Hydroelectric Plant, 1893189320 February 19776Foothill2
Mill Creek No. 1 Hydroelectric Plant, 189334° 5' 16", -117° 2' 22"
Monochrome-Compatible Electronic Color Television, 1946-1953194629 November 20011Princeton/Central Jersey40
Monochrome-Compatible Electronic Color Television, 1946-195340° 19' 54", -74° 37' 54"
Moore's Law, 1965196515 August 20186Santa Clara Valley190
Moore's Law, 196537° 24' 12", -122° 6' 40"
Mount Fuji Radar System, 196419641 March 200010Tokyo34
Mount Fuji Radar System, 196435° 41' 13", 139° 45' 23"
NAIC/Arecibo Radiotelescope, 196319631 November 20019Puerto Rico & Caribbean41
NAIC/Arecibo Radiotelescope, 196318° 20' 40", -66° 45' 11"
Nelson River HVDC Transmission System, 197219723 June 20057Winnipeg64
Nelson River HVDC Transmission System, 197254° 13' 6", -97° 36' 47"
Nikola Tesla (1856-1943), Electrical Pioneer (Special Citation)44° 49' 0", 20° 27' 49"
Nobeyama 45-m Telescope, 1982198214 June 201710Tokyo179
Nobeyama 45-m Telescope, 198235° 40' 31", 139° 32' 16"
Object-Oriented Programming, 1961-1967196127 September 20178Norway182
Object-Oriented Programming, 1961-196759° 56' 37", 10° 43' 6"
One-Way Police Radio Communication, 192819281 May 19874Southeastern Michigan9
One-Way Police Radio Communication, 192842° 20' 9", -83° 2' 35"
Opana Radar Site, 194119411 February 20006Hawaii33
Opana Radar Site, 194121° 12' 18", -156° 58' 10"
Outdoor large-scale color display system, 198019807 March 201810Fukuoka186
Outdoor large-scale color display system, 198032° 45' 45", 129° 51' 53"
Panama Canal Electrical and Control Installations, 191419144 April 20039Panama48
Panama Canal Electrical and Control Installations, 19148° 56' 3", -79° 33' 55"
Pearl Street Station, 1882188210 May 20111New York114
Pearl Street Station, 188240° 44' 3", -73° 59' 19"
Pinawa Hydroelectric Power Project, 190619066 June 20087Winnipeg77
Pinawa Hydroelectric Power Project, 190649° 51' 21", -97° 9' 15"
Pioneering Work on Electronic Calculators, 1964-197319641 December 200510Kansai65
Pioneering Work on Electronic Calculators, 1964-197334° 36' 11", 135° 51' 32"
Pioneering Work on the Quartz Electronic Wristwatch, 1962-1967196228 September 20028Switzerland45
Pioneering Work on the Quartz Electronic Wristwatch, 1962-196746° 59' 59", 6° 57' 12"
Popov's Contribution to the Development of Wireless Communication, 1895189520 May 20058Russia (Northwest)58
Popov's Contribution to the Development of Wireless Communication, 189559° 56' 36", 30° 22' 43"
Poulsen-Arc Radio Transmitter, 190219021 May 19948Denmark24
Poulsen-Arc Radio Transmitter, 190255° 40' 35", 12° 34' 9"
Power System of Boston's Rapid Transit, 1889188910 November 20041Boston52
Power System of Boston's Rapid Transit, 188942° 21' 23", -71° 3' 45"
Public Demonstration of Online Systems and Personal Computing, 1968196819 March 20176Santa Clara Valley176
Public Demonstration of Online Systems and Personal Computing, 196837° 27' 27", -122° 10' 36"
RAMAC, 1956195626 May 20056Santa Clara Valley60
RAMAC, 195637° 21' 10", -121° 56' 17"
Railroad Ticketing Examining System, 1965-1971196527 November 200710Kansai74
Railroad Ticketing Examining System, 1965-197134° 41' 59", 135° 28' 10"
Raman Effect, 1928192815 September 201210Kolkata129
Raman Effect, 192822° 29' 56", 88° 22' 7"
Reception of Transatlantic Radio Signals, 190119014 October 19857Newfoundland-Labrador6
Reception of Transatlantic Radio Signals, 190147° 34' 19", -52° 41' 21"
Rheinfelden Hydroelectric Power Plant, 1898 - 2010189825 September 20148Germany146
Rheinfelden Hydroelectric Power Plant, 1898 - 201047° 33' 58", 7° 48' 7"
Richmond Union Passenger Railway, 188818882 February 19923Richmond21
Richmond Union Passenger Railway, 188837° 32' 55", -77° 25' 58"
Rincón del Bonete, 1945194514 December 20129Uruguay132
Rincón del Bonete, 1945-32° 50' 1", -56° 25' 24"
SHAKEY: The World’s First Mobile Intelligent Robot, 1972197216 February 20176Santa Clara Valley173
SHAKEY: The World’s First Mobile Intelligent Robot, 197237° 27' 17", -122° 10' 19"
SPARC RISC Architecture, 1987198713 February 20156Santa Clara Valley153
SPARC RISC Architecture, 198737° 23' 33", -121° 57' 22"
SPICE Circuit Simulation Program, 1970197120 February 20116Santa Clara Valley
Oakland-East Bay
111
SPICE Circuit Simulation Program, 197037° 52' 31", -122° 15' 29"
Semi-Automatic Ground Environment (SAGE) 1951-1958195127 June 20121Boston125
Semi-Automatic Ground Environment (SAGE) 1951-195842° 27' 31", -71° 15' 49"
Semiconductor Planar Process and Integrated Circuit, 195919598 May 20096Santa Clara Valley93
Semiconductor Planar Process and Integrated Circuit, 195937° 25' 25", -122° 6' 16"
Shannon Scheme for the Electrification of the Irish Free State, 1929192929 July 20028United Kingdom and Ireland43
Shannon Scheme for the Electrification of the Irish Free State, 192952° 39' 50", -8° 37' 36"
Sharp 14-inch Thin-Film-Transistor Liquid-Crystal Display (TFT-LCD) for TV, 1988198810 June 201410Kansai141
Sharp 14-inch Thin-Film-Transistor Liquid-Crystal Display (TFT-LCD) for TV, 198834° 37' 18", 135° 49' 4"
Shilling's Pioneering Contribution to Practical Telegraphy, 1828-1837182818 May 20098Russia (Northwest)94
Shilling's Pioneering Contribution to Practical Telegraphy, 1828-183759° 56' 2", 30° 18' 8"
Shoshone Transmission Line, 1909190922 June 19915Denver20
Shoshone Transmission Line, 190939° 32' 46", -107° 19' 25"
Single-element Unidirectional Microphone - Shure Unidyne, 1939193931 January 20144Chicago137
Single-element Unidirectional Microphone - Shure Unidyne, 193942° 0' 45", -87° 46' 22"
Speak & Spell, the First Use of a Digital Signal Processing IC for Speech Generation, 1978197815 October 20095Dallas84
Speak & Spell, the First Use of a Digital Signal Processing IC for Speech Generation, 197832° 55' 31", -96° 45' 24"
Stanford Linear Accelerator Center, 196219621 February 19846Santa Clara Valley4
Stanford Linear Accelerator Center, 196237° 25' 16", -122° 12' 22"
Star of Laufenburg Interconnection, 1958195818 August 20108Switzerland100
Star of Laufenburg Interconnection, 195847° 33' 15", 8° 3' 1"
Superconducting Magnet System for the Fermilab Tevatron Accelerator/Collider, 1973-1985197313 November 20174Chicago185
Superconducting Magnet System for the Fermilab Tevatron Accelerator/Collider, 1973-198541° 50' 19", -88° 15' 44"
TIROS-1 Television Infrared Observation Satellite, 1960196027 September 20101Princeton/Central Jersey101
TIROS-1 Television Infrared Observation Satellite, 196040° 19' 54", -74° 37' 54"
TPC-1 Transpacific Cable System, 1964196411 November 20146
10
Hawaii148
TPC-1 Transpacific Cable System, 196421° 18' 35", -157° 51' 33"
Taum Sauk Pumped-Storage Electric Power Plant, 196319631 September 20055Saint Louis61
Taum Sauk Pumped-Storage Electric Power Plant, 196337° 19' 37", -91° 1' 27"
The CP/M Microcomputer Operating System, 1974197425 April 20146Santa Clara Valley139
The CP/M Microcomputer Operating System, 197436° 37' 25", -121° 55' 24"
The Discovery of the Principle of Self-Complementarity in Antennas and the Mushiake Relationship, 1948194827 July 201710Sendai180
The Discovery of the Principle of Self-Complementarity in Antennas and the Mushiake Relationship, 194838° 15' 13", 140° 52' 24"
The First Submarine Transatlantic Telephone Cable System (TAT-1), 1956195624 September 20067
8
Newfoundland-Labrador
Canadian Atlantic
United Kingdom and Ireland
70
The First Submarine Transatlantic Telephone Cable System (TAT-1), 195656° 22' 49", -5° 31' 25"
The First Submarine Transatlantic Telephone Cable System (TAT-1), 195648° 8' 47", -53° 57' 51"
The First Submarine Transatlantic Telephone Cable System (TAT-1), 195646° 13' 54", -60° 13' 20"
The First Two-Dimensional Nuclear Magnetic Resonance Image (MRI), 197319735 September 20181Long Island191
The First Two-Dimensional Nuclear Magnetic Resonance Image (MRI), 197340° 54' 46", -73° 7' 48"
The First Word Processor for the Japanese Language, 1971-197819711 November 200810Tokyo80
The First Word Processor for the Japanese Language, 1971-197835° 32' 7", 139° 41' 59"
The Floating Gate EEPROM, 1976 - 1978197620 August 20126Santa Clara Valley127
The Floating Gate EEPROM, 1976 - 197837° 25' 2", -121° 55' 15"
The High Definition Television System, 1964-1989196411 May 201610Tokyo161
The High Definition Television System, 1964-198935° 38' 8", 139° 36' 57"
The MU (Middle and Upper atmosphere) radar, 1984198413 May 201510Kansai155
The MU (Middle and Upper atmosphere) radar, 198434° 51' 8", 136° 6' 32"
Thomas A. Edison West Orange Laboratories and Factories, 1887188718 October 20081North Jersey76
Thomas A. Edison West Orange Laboratories and Factories, 188740° 47' 2", -74° 14' 2"
Thomas Alva Edison Historic Site at Menlo Park, 187618769 September 20061Princeton/Central Jersey68
Thomas Alva Edison Historic Site at Menlo Park, 187640° 33' 54", -74° 20' 15"
Tokaido Shinkansen (Bullet Train), 196419641 July 200010Nagoya35
Tokaido Shinkansen (Bullet Train), 196435° 6' 28", 136° 53' 8"
Toshiba T1100, a Pioneering Contribution to the Development of Laptop PC, 1985198529 October 201310Tokyo135
Toshiba T1100, a Pioneering Contribution to the Development of Laptop PC, 198535° 42' 52", 139° 25' 25"
Trans-Atlantic Telephone Fiber-Optic Submarine Cable (TAT-8), 1988198819 May 20161New Jersey Coast165
Trans-Atlantic Telephone Fiber-Optic Submarine Cable (TAT-8), 198840° 23' 51", -74° 8' 8"
Transcontinental Telegraph, 186118615 August 19905Denver16
Transcontinental Telegraph, 186142° 12' 7", -104° 33' 55"
Transmission of Transatlantic Radio Signals, 1901190112 December 20018United Kingdom and Ireland37
Transmission of Transatlantic Radio Signals, 190150° 1' 57", -5° 15' 21"
Two-Way Police Radio Communication, 193319331 May 19871North Jersey10
Two-Way Police Radio Communication, 193340° 40' 3", -74° 7' 6"
US Naval Computing Machine Laboratory, 1942-194519421 October 20012Dayton39
US Naval Computing Machine Laboratory, 1942-194539° 45' 32", -84° 11' 30"
Vapor-phase Axial Deposition Method for Mass Production of High-quality Optical Fiber, 1977-1983197721 May 201510Tokyo156
Vapor-phase Axial Deposition Method for Mass Production of High-quality Optical Fiber, 1977-198335° 26' 27", 139° 18' 51"
Virginia Smith High-Voltage Direct-Current Converter Station, 1988198821 May 20155Denver157
Virginia Smith High-Voltage Direct-Current Converter Station, 198839° 42' 26", -105° 8' 14"
Volta's Electrical Battery Invention, 179917991 September 19998Italy27
Volta's Electrical Battery Invention, 179945° 48' 49", 9° 4' 31"
Vucje Hydroelectric Plant, 1903190325 June 20058Serbia and Montenegro59
Vucje Hydroelectric Plant, 190342° 52' 0", 21° 55' 0"
Vulcan Street Plant, 1882188215 September 19774Northeastern Wisconsin1
Vulcan Street Plant, 188244° 14' 52", -88° 24' 15"
WEIZAC Computer, 195519555 December 20068Israel69
WEIZAC Computer, 195531° 53' 33", 34° 47' 52"
Westinghouse Atom Smasher, 193719371 May 19852Pittsburgh7
Westinghouse Atom Smasher, 193740° 26' 5", -79° 53' 26"
Westinghouse Radio Station KDKA, 192019201 June 19942Pittsburgh25
Westinghouse Radio Station KDKA, 192040° 27' 15", -79° 53' 26"
Weston Meters, 1887-1893188723 September 20161North Jersey170
Weston Meters, 1887-189340° 44' 28", -74° 10' 43"
Whirlwind Computer, 1944-59194427 June 20121Boston124
Whirlwind Computer, 1944-5942° 21' 40", -71° 5' 48"
World's First Low-Loss Optical Fiber for Telecommunications, 197019701 May 20121Rochester121
World's First Low-Loss Optical Fiber for Telecommunications, 197042° 9' 43", -77° 5' 39"
World's First Reliable High Voltage Power Fuse, 190919093 August 20124Chicago126
World's First Reliable High Voltage Power Fuse, 190942° 0' 5", -87° 40' 46"
Yosami Radio Transmitting Station, 1929192919 May 200910Nagoya81
Yosami Radio Transmitting Station, 192934° 58' 27", 137° 1' 1"
Zenit Parabolic Reflector L-band Pulsed Radar, 1938193831 May 20178Ukraine178
Zenit Parabolic Reflector L-band Pulsed Radar, 193850° 0' 19", 36° 15' 0"