View source for Category:Communications ← Category:Communications You do not have permission to edit this page, for the following reason: You are not allowed to execute the action you have requested. You can view and copy the source of this page. == Background == [[Image:Cooke and Wheatstone electric telegraph.jpg|thumb|right|340px|Cooke and Wheatstone electric telegraph]] Communications refers to the use of signals to transfer voice, data, image, and/or video information between locations, the main applications of which are in communications science, engineering, and technology. From the bonfires and smoke signals to early modern optical telegraphs, humankind has attempted to move communication beyond the realm of earshot. Among the first practical uses of electrical engineering, early communication devices included the telegraph, first conceived in the 1700s and realized in 1837 by Charles Wheatstone and William Cooke and by Samuel Morse. Through the next century, advancements in the telephone, radio, television and today's Internet, completely changed the way people communicate and interact with one another. == STARS Articles == STARS articles are peer-reviewed articles on the history of major developments in technology. Available in the communications category are: *[[Electromechanical Telephone-Switching|Electromechanical Telephone-Switching]] *[[Telephone Transmission|Telephone Transmission]] *[[Telephones|Telephones]] *[[Underwater Cables|Underwater Cables]] == Subcategories == *'''[[:Category:Broadcasting|Broadcasting]]''' - The transmission of audio or video to an audience. *'''[[:Category:Communication equipment|Communication equipment]]''' - This refers to both the hardware and software used for different types of communication. *'''[[:Category:Communication methods|Communication methods]]''' - Methods used for different types of communication (broadband, mobile, multimedia, etc.) and for different purposes (biomedical, military). *'''[[:Category:Communication networks|Communication networks]]''' - A network of communication circuits managed as a single unit. *'''[[:Category:Communication switching|Communication switching]]''' - Used to enable sharing of physical lines of communication. *'''[[:Category:Communication systems|Communication systems]]''' - Elements of communications systems, such as protocols, quality of service and routing are covered. *'''[[:Category:Couplers|Couplers]]''' – Coupling is the transfer of energy from one medium to another. *'''[[:Category:Cryptography|Cryptography]]''' - the practice and study of secure communications in the presence of third-party *'''[[:Category:Fiber optics|Fiber optics]]''' - Transmitting light through optical fibers *'''[[:Category:Image communication|Image communication]]''' - Includes facsimile, picture archiving and communication systems. *'''[[:Category:Message systems|Message systems]]''' - Includes postal services and voice mail. *'''[[:Category:Multiplexing|Multiplexing]]''' - The combining of two or more signals into a single wave from which the signals can be individually recovered. Examples include time division multiplexing and frequency division multiplexing. *'''[[:Category:Radar|Radar]]''' - Radio detection and ranging, an object detection system using radio waves *'''[[:Category:Radio communication|Radio communication]]''' - Includes types (indoor, land mobile, etc.) and aspects (frequency, spectrum management, etc.). *'''[[:Category:Radiometry|Radiometry]]''' - The study and measurement of electromagnetic radiation *'''[[:Category:Remote sensing|Remote sensing]]''' - Sensors which operate by wireless means *'''[[:Category:Signal generation & recording|Signal generation & recording]]''' - The generation and recording of various signals including audio recording, digital recording and noise generators *'''[[:Category:Signals|Signals]]''' - Topics covering both types of signals, analog, where the signals are carried by continuously varying quantities, and digital, where the signals are restricted to a finite set of discrete values *'''[[:Category:TV|TV]]''' - Cable, digital, and mobile television are covered. *'''[[:Category:Telegraphy|Telegraphy]]''' - A system of telecommunication for the transmission of graphic symbols, usually letter of numerals, by the use of a signal code. Types include electrical, radio, and wireless. *'''[[:Category:Telephony|Telephony]]''' - The use of devices for voice communication, for example, cellular and digital telephone systems. *'''[[:Category:Terrain mapping|Terrain mapping]]''' - Cartography and other methods and topics dealing with mapping *'''[[:Category:UHF & VHF technology|UHF & VHF technology]]''' - The technologies used for "ultra-high" and "very-high" radio frequencies. *'''[[:Category:Ultra wideband technology|Ultra wideband technology]]''' – Technologies using extremely narrow pulses and very wide frequencies Return to Category:Communications. Retrieved from "http://ethw.org/Category:Communications"