| |  | Alan Mathison Turing, OBE (23 June 1912 - 7 June 1954) was an English mathematician, logician, and cryptographer. Turing is often considered to be... |  | Harold Hall "Doc" Keen (1894-1973) was a British engineer who oversaw the construction of the British bombe, a codebreaking machine used in World... |  | B. Jack Copeland is Professor of Philosophy at the University of Canterbury, Christchurch, New Zealand. Copeland received a BPhil and DPhil from... |  | Thomas (Tommy) Harold Flowers, MBE (22 December 1905 - 28 October 1998) was a British engineer. During World War II, Flowers designed "Colossus",... |  | Sir Francis Harry Hinsley OBE (26 November, 1918 - 16 February, 1998) was an English historian and cryptanalyst who worked at Bletchley Park during... |  | Irving John (Jack) Good (born 9 December 1916) is a British statistician who worked also as a cryptographer at Bletchley Park. In his publications... |  | Frederick William Winterbotham was a British Royal Air Force officer who during World War II was responsible for the distribution of Ultra... |  | Brigadier John Hessell Tiltman (25 May 1894-10 August 1982) was a British Army officer who worked in intelligence, often at or with the Government... |  | Alfred Dillwyn 'Dilly' Knox (23 July 1884 - 27 February 1943) was a British codebreaker and classical scholar at King's College, Cambridge. He was... |  | Alexander Guthrie (Alastair) Denniston (1 December 1881 - 1 January 1961) was a British codebreaker in Room 40 and first head of the Government... | |
