The British Colossus computer was one of the most important tools in the wartime effort to break German codes. Based on interviews and on recently declassified documents, this article clarifies the roles played by Thomas Flowers, Alan Turing, William Tutte, and Max Newman in the events leading to the installation of the first Colossus at Bletchley Park, Britain's wartime code-breaking establishment, in December 1943.
['B. J. Copeland']
Colossus: its origins and originators