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The electric telephone was invented in the 1870s, ... [55] [56] By the 1990s, telecommunication networks such as the public switched telephone network (PSTN) ...
Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the telegraph, telephone, television, and radio. Early telecommunication networks used metal wires as the medium for transmitting signals. These networks were used for telegraphy and telephony for many decades
Joseph Carl Robnett Licklider (1915–1990) was a faculty member of Massachusetts Institute of Technology (MIT), and researcher at Bolt, Beranek and Newman.He developed the idea of a universal computer network at the Information Processing Techniques Office (IPTO) of the United States Department of Defense Advanced Research Projects Agency (ARPA).
[49] [50] WDM subsequently became the common basis of all telecommunications networks [51] and a foundation of the Internet. [52] 1997 – SixDegrees.com is launched, the first of several early social networking services. 1998 – Google, an advanced search engine, is launched. [53] 1999 – Napster peer-to-peer file sharing is launched. [36]
19 February 1880: The photophone, also called a radiophone, is invented jointly by Alexander Graham Bell and Charles Sumner Tainter at Bell's Volta Laboratory. [18] [19] The device allowed for the transmission of sound on a beam of light. 20 March 1880: National Bell Telephone merges with others to form the American Bell Telephone Company.
The bandwidth of digital telecommunication networks has been rapidly increasing at an exponential rate, as observed by Edholm's law, [42] largely driven by the rapid scaling and miniaturization of MOS technology. [43] [39] The British companies Pye TMC, Marconi-Elliott and GEC developed the digital push-button telephone, based on MOS IC ...
A cellular network or mobile network is a telecommunications network ... leading to the transition from analog to digital networks. [26] The MOSFET invented at ...
The Wardenclyffe Power Plant prototype, intended by Nikola Tesla to be a "World Wireless" telecommunications facility.. The World Wireless System was a turn of the 20th century proposed telecommunications and electrical power delivery system designed by inventor Nikola Tesla based on his theories of using Earth and its atmosphere as electrical conductors.