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Z3
Konrad Zuse invents Z3: A floating point binary arithmetic, used for aerodynamic calculations -
Bell Labs Moddel II
Relay based calculator by George Stibitz: Used to assist testing of machine that aims large guns at targets and was programmable by paper tape -
Mark 1
IBM and Howard Aiken make relay based calculator that produced mathematical tables and was 50 ft long -
ENIAC
1st fully electronic general purpose, digital computer by John Mauchly and J. Presper Eckert -
The Transistor
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
