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Reference.org
Codebook
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<p>A codebook is a type of document used for gathering and storing <a href="/facts/Cryptography_code/FP5oHusU">cryptography codes</a>. Originally, codebooks were often literally <a href="/facts/Books/Yylgt4AC">books</a>, but today "codebook" is a byword for the complete record of a series of codes, regardless of physical format. </p>