Alan Turing
1912 – 1954Mathematician, codebreaker, father of computer science
Formalized what it means to "compute" before a general-purpose computer existed, then spent the war putting that theory to work at Bletchley Park breaking the Enigma cipher — shortening World War II by an estimated two years. Every program that has ever run, including this one, runs on the machine model he described in 1936.
“Sometimes it is the people no one imagines anything of who do the things that no one can imagine.”