character: Henryk Zygalski
topic: Zygalski sheets for breaking Enigma codes
grade: 9
subject: Computer Science
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character: Alan Turing
topic: Cryptography and breaking the Enigma
grade: 9
subject: Computer Science
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character: Marian Rejewski
topic: Mathematical theories used to decrypt Enigma messages
grade: 9
subject: Computer Science
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character: Bletchley Park
topic: Home of Allied codebreakers in WWII
grade: 9
subject: Computer Science
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