Capturing the Enigma machine and cracking the Nazi Enigma codes was a major and (for a long time) secret World War II accomplishment of British cryptographers, computer experts and special Royal Navy teams working at Bletchley Park, near Milton Keynes. The people who worked there, and their activities were so secret that even the establishment's post office workers didn't talk about their wartime experiences until 1998. Now, Bletchley Park's fascinating activities, along with several variations of the devilishly clever Enigma code generating machines ( one example pictured here), are the subject of an engrossing museum.
On the same estate, the National Museum of Computing has rebuilt and working models of some of the computers that helped break the codes - including Colossus and a Bombe machine - along with other examples of Britain's earliest and most significant computer developments.
Math wizards, junior engineers, computer geeks, puzzlers, cryptographers and would be spies will love this place.
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