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.
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.
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.
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