Hollerith files in the Freebornery


Bletchley Park

Bletchley Park
Milton Keynes, United Kingdom

The Hollerith system managed the Bletchley Park Punch-Card Intelligence Index and was thus key to the success of the codebreaking work, specifically recording Enigma decryption information.


  • Title: Hollerith files in the Freebornery
  • Date: 1939/1945
  • Date Created: 1945
  • Location: Bletchley Park
  • Rights: Crown Copyright. By kind permission Director GCHQ

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