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File formats
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Microsoft Office
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Microsoft Excel
MS-CTXLS Excel Custom Toolbar Binary File Format Structure Specification (2008-06-27)
MS-CTXLS Excel Custom Toolbar Binary File Format Structure Specification (2018-08-28)
MS-QDEFF Query Definition File Format (2019-09-24)
MS-QDEIF Query Definition Interoperability Format (2018-08-28)
MS-XLDM Spreadsheet Data Model File Format (2018-08-28)
XLS, Microsoft Excel
XLSB, Microsoft Excel
