Andrew Hodges (author of Alan Turing: The Enigma) delivers a lecture on Alan Turing, the founder of modern computer science, as part of LGBT month. The British mathematician Alan Turing, whose centenary falls this year, was the founder of modern computer science. He was also the chief scientific figure in the Anglo-American codebreaking effort in World War II, centred on Bletchley Park. His life as a gay man illustrates the harsh oppression but also the growing consciousness of that era.