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Colossus.jpg(500 × 331 pixels, file size: 97 KB, MIME type: image/jpeg)



Colossus codebreaking computer in operation

Date 1943
The National Archives logo.png This file is from the collections of The National Archives (United Kingdom), catalogued under document record FO850/234. For high quality reproductions of any item from The National Archives collection please contact the image library.

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Author Unknown


Public domain This artistic work created by the United Kingdom Government is in the public domain.

This is because it is one of the following:

  1. It is a photograph created by the United Kingdom Government and taken prior to 1 June 1957; or
  2. It was commercially published prior to 1963; or
  3. It is an artistic work other than a photograph or engraving (e.g. a painting) which was created by the United Kingdom Government prior to 1963.

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