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• Dossier on Security at Bletchley Park. W/T security and deception; security dissemination...

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 50/22

• Dossier on RASTER. Notes on RASTER, a German Air, Army and Police stencil transposition...

  Held by

  The National Archives, Kew

  Date

  1944 Mar 01 - 1945 Jan 01

  Reference

  HW 50/55

• Japanese Naval/Air-Ground Sigint. Historical notes on the collection and processing...

  Held by

  The National Archives, Kew

  Date

  1943 Apr 11 - 1945 Aug 26

  Reference

  HW 50/77

• Interception and Sets - Air, Army, Navy. Mainly statistics on availability of operators...

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 50/33

• Synopsis on 'Y' [Sigint] at Sea (European Naval). Notes on the establishment of sea-going...

  Held by

  The National Archives, Kew

  Date

  1941 Apr 04 - 1942 Jul 22

  Reference

  HW 50/38

• Dossier on Hollerith Machinery. Historical notes on use of Hollerith equipment under...

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 1945 Jul 02

  Reference

  HW 50/72

• Notes on ISSIS [Inter-Service Special Intelligence School] and Japanese NS [Naval...

  Held by

  The National Archives, Kew

  Date

  1940 Oct 16 - 1945 Nov 10

  Reference

  HW 50/78

• Pearl Harbour - The Evidence for: The paper prepared for Winston Churchill's history...

  Held by

  The National Archives, Kew

  Date

  1941 Feb 01 - 1941 Dec 07

  Reference

  HW 50/52

• Signals from Naval Section, Government Code and Cypher School to Cdr O'Callaghan's...

  Held by

  The National Archives, Kew

  Date

  1943 Aug 16-1943 Oct 27

  Reference

  HW 41/50

• Italian naval messages

  Held by

  The National Archives, Kew

  Date

  1939 Aug 17-1939 Nov 27

  Reference

  HW 18/50

• GRU Naval (Soviet Naval Intelligence) Attaché Traffic: Moscow with Stockholm, Sweden....

  Held by

  The National Archives, Kew

  Date

  1941 Feb 17-1942 Sept 26

  Reference

  HW 15/50

• GC&CS European Naval Section Extracts and Dossiers collected apparently for historical...

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 50/15

• GC&CS Japanese Naval Section Extracts from Supporting Histories apparently for historical...

  Held by

  The National Archives, Kew

  Date

  1942 Jan 16 - 1945 Jul 31

  Reference

  HW 50/16

• Bletchley Park Records. Correspondence concerning the location and retention or destruction...

  Held by

  The National Archives, Kew

  Date

  1945 Aug 20 - 1950 Jul 07

  Reference

  HW 50/5

• JIB [Joint Intelligence Bureau], JIC (Joint Intelligence Committee] and JSIB [Joint...

  Held by

  The National Archives, Kew

  Date

  1934 Nov 07 - 1945 Sep 25

  Reference

  HW 50/24

• History of the Fish Section. History of the section responsible for decryption of...

  Held by

  The National Archives, Kew

  Date

  1942 Jun 01 - 1945 May 31

  Reference

  HW 50/63

• Dossiers on Air Section GC&CS

  Held by

  The National Archives, Kew

  Date

  1936 Apr 01 - 1945 May 06

  Reference

  HW 50/62

• RAF Field Units in Mediterranean and Western Europe, including Mediterranean and...

  Held by

  The National Archives, Kew

  Date

  1941 Jun 21 - 1945 Feb 20

  Reference

  HW 50/49

• Communications Dossier No 3, Far East - USA - Japanese Army/Air and Naval Sigint....

  Held by

  The National Archives, Kew

  Date

  1942 Apr 06 - 1945 Aug 05

  Reference

  HW 50/35

• Use of Japanese Weather Reports in Eastern Theatre 1944-1945. A description of the...

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1945 Aug 30

  Reference

  HW 50/75