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File formats
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Microsoft
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Office
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Microsoft Word
DOC, Microsoft Word
DOCX, Microsoft Word
MS-CTDOC Word Custom Toolbar Binary File Format Structure Specification (2008-06-27)
MS-CTDOC Word Custom Toolbar Binary File Format Structure Specification (2018-08-28)
MS-WORDLFF Word (.xml) Co-Authoring File Format in Document Lock Persistence Structure (2019-03-19)