Alan Turing is widely considered to be the father of theoretical computer science and artificial intelligence. He was a brilliant computer scientist, mathematician, logician, cryptanalyst, philosopher, and theoretical biologist.
Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general purpose computer.
During the Second World War, Turing played a pivotal role in cracking intercepted coded messages that enabled the Allies to defeat the Nazis in many crucial engagements, including the Battle of the Atlantic. In doing so he played a central role, helping the Allies win the war.
One of Turing’s most famous quotes states:
Sometimes it is the people no one can imagine anything of, who do the things no one can imagine.