See also:

• Computers: History: Pioneers: Flowers, Tommy  (3)
• Science: Math: Applications: Communication Theory: Cryptography: Historical  (7)

Bletchley Park Museum : Lorenz Cipher Machine - - Descriptions of the Lorenz cipher machine and the Colossus computer built to crack the code. Information on the rebuild of a working Colossus.

Colossus at Bletchley Park - - History and photos.

How a Computer saved the world - - Article from the American Computer Science Association about the history of Colossus (and IBM's involvement in WWII).

IEEE Computer Society: Colossus - - Brief description and photos.

Nationmaster Encyclopedia: Colossus computer - - The purpose, origins, and design of the world's first programmable digital electronic computer.

Project X: The Colossus Rebuild Project. - - Brief description and photo.

Take a Tour of Bletchley Park - - Information and photos on the Colossus rebuild project at Bletchley Park.