Also after cracking the code they didn't deploy it on all occasions. this was to ensure that the Germans didn't come to know about engima being cracked. they only deployed to save high value targets and let the Germans hit 'low value' targets on purpose.
Alan Turing based his device on an existing polish one. He laid down much of the maths for computers. He was screwed over by the state for being gay. His atheism was also considered unnerving by some, as the main enemy once the cold war started was atheist Soviets. So, if you like computers and all that they do for you, thank a gay atheist.
