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Konrad Zuse invents Z3: A floating point binary arithmetic, used for aerodynamic calculations
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Relay based calculator by George Stibitz: Used to assist testing of machine that aims large guns at targets and was programmable by paper tape
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IBM and Howard Aiken make relay based calculator that produced mathematical tables and was 50 ft long
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1st fully electronic general purpose, digital computer by John Mauchly and J. Presper Eckert
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Bell Laboratories inventors Walter Brattain, William Shockley, and John Bradeen founded the transistor which allowed inventors to create electrical switches with solid materials in place of cauums
