HW 18/205 | U-Boat cypher 29 Nov 1943 to 18 Mar1944 |
HW 25/28 | Solution of German Teleprinter Cyphers (Testery) Linguistic Methods 10 May 1941 to 30 Sep 1945 |
HW 25/5 | Account of the methods used for breaking German teleprinter cypher messages 1 Jun 45 - 30 Jun 1945 |
HW 31 | Government code and cypher school - Commercial Section - reports of decrypted messages in private codes and cyphers, comprising messages passing between commercial organisation (firms, banks, etc world wide. 1943-1945. Records of Ministry for Economic Warfare. The Commercial Section was set up in 1938. It moved location four times: from London to Bletchley at the outbreak of war and back to London in 1939, because of pressure on space at Station X; in September 1940 to a house some miles from Bletchley; and back to London in May 1942 as part of the Civil Branch of the school. The section was closed down in August 1945. |
HW 41/344 | Notes on German medium grade cyphers 1 Oct 1941 - 8 Oct 1944 |
HW 25/8 Enigma | Chiffriermaschinen=Haandelsmaschine; a pamphlet on the use of Enigma the "large machine" particularly for business purposes. 1 Jan 1923 to 31 Dec 1950 |
HW 25/34 | Colossus working aids. Colossus was the first computer used at Bletchley Park for cryptoanalytic work in particular on Tunney the German High Command on-line cypher 1 Jan 1945 - 30Aug 1945 |
HW 25/35/2 | German One Time Pad Machine 14 June 1932 to 31 Dec 1940 |
HW 13/125 | ULTRA reports on GAF W/T and cypher arrangements 14 Feb 1944 to 16 Dec 1944 |
HW 13/126 | PEARL/ZIP reports on GAF W/T and cypher arrangement 5 May 1943 to 6 May 1945 |
HW 51/80 | Details of enemy cyphers obtained from interrogations of POW's 30 JUL 1942 - 4 Apr 1944 |
HW53/56 | Irish cyphers. Correspondence and work done 10 Apr 1944 to 12 Jun 1944 |
HW 29 | Government code and cypher school; commercial section; reports of P/L and public code messages throughout the whole of WW2 1938 TO 1946 |