Search results
Results from the WOW.Com Content Network
Many electrical telegraph systems were invented that operated in different ways, but the ones that became widespread fit into two broad categories. First are the needle telegraphs, in which electric current sent down the telegraph line produces electromagnetic force to move a needle-shaped pointer into position over a printed list.
The electric telegraph was slower to develop in France due to the established optical telegraph system, but an electrical telegraph was put into use with a code compatible with the Chappe optical telegraph. The Morse system was adopted as the international standard in 1865, using a modified Morse code developed in Germany in 1848. [1]
Henry Edward Roberts (September 13, 1941 – April 1, 2010) was an American engineer, entrepreneur and medical doctor who invented the first commercially successful personal computer in 1974. [1] He is most often known as " the father of the personal computer ."
Keyboard perforators were a development from Charles Wheatstone's perforator of 1858, [3] a hand-operated device which produced a punched paper tape for use in automatic telegraph transmitters. Soon after, he set up the Kleinschmidt Electric Company. [4] With George Seely, he developed signaling equipment for railways.
On April 27, 1999, Thompson and Ritchie jointly received the 1998 National Medal of Technology from President Bill Clinton for co-inventing the UNIX operating system and the C programming language which together have "led to enormous advances in computer hardware, software, and networking systems and stimulated growth of an entire industry ...
1907: Rosenthal puts in his image telegraph for the first time a photocell. 1911: First film studios are created in Hollywood and Potsdam- Babelsberg . 1912: The first radio receiver is created, in accordance with the Audion principle. 1913: The legal battle over the invention of the electron tube between Robert von Lieben and Lee de Forest is ...
Charles Babbage KH FRS (/ ˈ b æ b ɪ dʒ /; 26 December 1791 – 18 October 1871) was an English polymath. [1] A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer.
Grace Brewster Hopper (née Murray; December 9, 1906 – January 1, 1992) was an American computer scientist, mathematician, and United States Navy rear admiral. [1] She was a pioneer of computer programming.