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The history of telecommunication began with the use of smoke signals and drums in Africa, Asia, and the Americas. In the 1790s, the first fixed semaphore systems emerged in Europe . However, it was not until the 1830s that electrical telecommunication systems started to appear.
Claude Shannon (1916–2016), founder of information theory and modern cryptography, invented Minivac 601, and co-invented the first wearable computer (with Edward O. Thorp) Ugo Cerletti (1877–1963), together with Lucio Bini (1908–1964), Italy – Electroconvulsive therapy; Leona Chalmers (c. 1937), U.S. – modern menstrual cup
His favorite individual clue is "It might turn into a different story" (whose solution is SPIRAL STAIRCASE). [19] In addition to work as a crossword editor, Shortz is a skilled table tennis player. He has co-owned the Westchester Table Tennis Center in Pleasantville, New York since 2009, and has been playing table tennis daily for the past 11 ...
The bel (B) and the smaller decibel (dB) are units of measurement of sound pressure level (SPL) invented by Bell Labs and named after him. [218] [N 28] [219] Since 1976, the IEEE's Alexander Graham Bell Medal has been awarded to honor outstanding contributions in the field of telecommunications. A.G. Bell issue of 1940
Robert Haig Weitbrecht (1920-1983) was an engineer at SRI International and later the spin-off company Weitbrecht Communications who invented a type of a modem (a form of acoustic coupler). Early life and education
An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one ...
Walter L. Shaw Sr. (December 20, 1916, in Vineland, New Jersey [1] – July 21, 1996 [2]) was an American telecommunications engineer and inventor who clashed with his employer (variously identified as AT&T, [3] Bell [1] [4] and Southern Bell [2]) over ownership of his inventions.
Samuel Finley Breese Morse (April 27, 1791 – April 2, 1872) was an American inventor and painter. After establishing his reputation as a portrait painter, Morse, in his middle age, contributed to the invention of a single-wire telegraph system based on European telegraphs.