[MS-XLSB]: Excel (.xlsb) Binary File Format | Microsoft Learn
https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-xlsb/acc8aa92-1f02-4167-99f5-84f9f676b95a
WebMay 17, 2022 · In this article. Specifies the Excel (.xlsb) Binary File Format, which is a collection of records and structures that specify Excel workbook content. The content can include unstructured or semi-structured tables of numbers, text, or both numbers and text, formulas, external data connections, charts and images.
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