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This was built by John Atanasoff and his graduate studen, Clifford Berry. it was digital and used vacuum tubes. This was withing the time period of 1937 to 1942
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The Collosus Computer was built with Alan Turing, as well as two others: Bill Tute and Tommy Flowers. This computer was used to assist with breaking German Crypto Codes.
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In 1946 - The Eniac computer was built, and considered the firsty successful highly electronic digital computer
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His donation to the Computer industry a special type of machine instruction called "conditional control transfer" -- which permitted the program sequence to be interrupted and reinitiated at any point. Another donation to the Computer industry was on May 6, 1949 EDSAC ran its first programs.
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This is a electronic discrete variable automatic computer. This is the first computer created that stored programs. John Von Neumann wrote the complete first draft of a report on the EDVAC computer, This report contained the logic design of the computer.
