23 June 1912 – 7 June 1954
- pioneering English computer scientist, mathematician, logician, cryptanalyst and theoretical biologist.
- influential in the development of theoretical computer science.
- during the WWII, led the section responsible for German naval cryptanalysis. Turing played a pivotal role in cracking intercepted coded messages that enabled the Allies to defeat the Nazis in many crucial engagements.
- prosecuted in 1952 for homosexual acts, when such behaviour was still a criminal act in the UK. He accepted chemical castration as an alternative to prison.