Colossus was the world's first programmable (to a limited extent) digital electronic computer. It was built by the British Post Office Research Station at Dollis Hill, by Thomas Flowers and crew to a design by Max Newman and associates of Bletchley Park. It was primarily designed for cryptanalysis in an attempt to break one of the cyphers used by the German military for its most secure strategic communications during WWII.
Descriptions of the Lorenz cipher machine and the Colossus computer built to crack the code. Information on the rebuild of a working Colossus.
History and photos.
Article from the American Computer Science Association about the history of Colossus (and IBM's involvement in WWII).
Information and photos on the Colossus rebuild project at Bletchley Park.
The purpose, origins, and design of the world's first programmable digital electronic computer.
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