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Start of the tour
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Our guide around a small piece of Britain
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Listening
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Early technnology (and some newer technology)
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How it works
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Connections
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Output
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Big computer technology
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Make your own decryption machine
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Admiring the Harrier
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Alan Turing
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Bletchley Park buildings
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We are here; don't tell anyone #devdayout
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The key wasn't this obvious on all the messages #devdayout