Colossus was built in 1944 to perform Boolean operations on a paper data tape that streamed through the machine at 30 miles an hour. Its logic was literally wired into the machine. It is ...

Comprising 2,500 valves and rebuilt from a series of black and white photos and some circuit diagrams.The original wartime Colossus was designed and built by the Post Office engineer, Tommy ...

Turing had previously been involved with the construction of both the Colossus, the electronic computer built at Bletchley ... explains in detail how the Enigma machine works and how its codes ...