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Between 1940-1946 , George Stibitz and his team create the first computer network. These machines served more than one user. Soon they became obsolete because they were based on slow mechanical relays rather than electronic switches. Without this discovery we would not of had more depth knowledge of switching networks.
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The Trackball, 1941 , Ralph Benjamin , without the trackball , the touch screens phones or the mouse or trackpad we are using to do this exact assignment would not of had the push it need to be successful.
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Konrad Zuse (inventor and computer pioneer) designed the first serious of Z computers in 1936. Z1 was completely mechanical and only worked for a few minutes at a time at most. It works on Boolean operations and flip-flops on the basis of vacuum tubes. The use of different technology in the coming decades led to Z2 and eventually Z3.Z3 was a secret project of the German government, put to use by the German Aircraft Research Institute in order to perform statistical analyses of wing flutter.
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Atanasoff-Berry Computer (ABC) was designed and built by John Vincent Atanasoff and his assistant, Clifford E. Berry. It was the first machine to use capacitors for storage (as in current RAM) and was capable of performing 30 simultaneous operations.
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1943 , invented by Tommy Flowers. It was used by the British to read secret German messages during World War II.Until the 1970s, these computers were very secret. After the war, all Colossus were broken into bits and designs were destroyed. No one knew the first people to make Colossus. In 2007, engineers made a working prototype of Colossus. It had a huge influence on coding and decrypting.