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Catalogue description Government Code and Cypher School: Cryptographic Studies
| Reference: | HW 25 |
|---|---|
| Title: | Government Code and Cypher School: Cryptographic Studies |
| Description: |
At the end of the Second World War histories were written of various aspects of the work of the Bletchley Park organisation. Records in the series include volumes covering the breaking of two of the major cypher systems used by the enemy - ENIGMA and TUNNY, photographs of ENIGMA, TUNNY and COLOSSUS machinery, and papers on the development of COLOSSUS. |
| Date: | 1920-1978 |
| Held by: | The National Archives, Kew |
| Legal status: | Public Record(s) |
| Language: | English |
| Physical description: | 38 files and volumes |
| Access conditions: | Open unless otherwise stated |
| Immediate source of acquisition: |
From 1999 Government Communications Headquarters |
| Selection and destruction information: | The entire series has been preserved |
| Accruals: | Series is accruing |
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