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Complex Number Calculator (CNC)
The Complex Number Calculator is completed in 1939. It was designed by George Stibitz and demonstrated in 1940, at the American Mathematical Society conference. -
Period: to
1940's
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Z3 Computer
The Z3 was used for aerodynamic calculations and was created by Konrad Zuse. The original computer was destroyed in a Berlin bombing in 1943. -
The Atanasoff-Berry Computer (ABC)
This computer was the first automatic electronic digital computer, designed and completed by Professor John Vincent Atanasoff and Clifford Berry. -
Bell Labs Relay Interpolator
Commissioned by the US Army, Bell Laboratories designed a machine to assist in directing the M-9 gun. This machine was a relay-based calculator model. -
Harvard Mark 1
Howard Aiken designed the Mark 1 and it was built by IBM. The Harvard Mark 1 is a room-sized, relay-based calculator. -
Plankalkül
Konrad Zuse begins work on Plankalkül (Plan Calculus), the first algorithmic programming language.