Colossus its Purpose and Operation

A website created by the late Tony Sale documenting the history, science, and engineering of WWII cryptanalysis, including the Colossus computer, Enigma machine, and Lorenz cipher system at Bletchley Park. It hosts simulators, lecture notes, rebuild documentation for Colossus, and original wartime documents such as the Newmanry History and Bletchley Park Cryptographic Dictionary. The site also covers Tony Sale's involvement in saving and reconstructing Bletchley Park as a museum.