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Complex Number Calculator
The inventor was George Stibitz. It was one of the first examples of remote access computing. -
Atanasoff-Berry Computer
The inventor was Professor John Vincent Atanasoff. It was made to solve a patent dispute about the invention of the computer.This was the original idea of several basic computer ideas. -
First Colossus operational at Bletchley Park
This was designed by Tommy Flowers. It was designed to break the complex Lorenz ciphers used by Nazis in WW2. -
Harvard Mark 1
This was conceived by Howard Aiken. It was a room sized, relay-based calculator that produced mathematical tables. -
First Computer Program to Run on a Computer
It was created by researchers Frederic Williams, Tom Kilburn, and Geoff Toothill. It was the first high-speed electronic random access memory for computers.