Organizations
OP-20-G
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Organizations
OP-20-G
WWII US Navy signals intelligence group
uncommon · Q224375
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Organizations
1st Cavalry Division (United States)
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1st Marine Division
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2nd Marine Division
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22nd Guards Heavy Bomber Aviation Division
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104th Training Division
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2nd Cavalry Division (United States)
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People
Alan Turing
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Concepts
Magic (cryptography)
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Code Girls
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Solomon Kullback
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Richard Leibler
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Arthur Levenson
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