He was one of the first people to work with modern digital computers. He was the first person to think of using the computer for different things. He told people that computers could run different programs. Turing introduced the idea of the Turing machine in 1936. The machine was imaginary, and ran the set of commands. You could think about problems of computation using this machine as the metaphor.
Turing also thought of the Turing test.
Alan Turing was the gay man. In 1952, Turing admitted having sex with the man. At that time in England, homosexuality was the crime. He was tried and convicted of this crime in the British court. and was forced to make the choice. He had to choose between going to jail or "chemical castration" (taking female hormones like estrogen to lower his sex drive). He chose the hormones. But this made him impotent (unable to have sex) and made him grow breasts. After suffering ase effects for two years, he committed suicide (killed himself) with cyanide in 1954.
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