Microsoft Office Binary (doc, xls, ppt) File FormatsPublished: February 15, 2008 | Updated: February 15, 2008 The documents listed below are covered by the Microsoft Open Specification Promise.
Microsoft WordWord 97-2007 Binary File Format (.doc) Specification PDF | XPS Microsoft PowerPointPowerPoint 97-2007 Binary File Format (.ppt) Specification PDF | XPS Microsoft ExcelExcel 97-2007 Binary File Format (.xls) Specification PDF | XPS Excel 2007 Binary File Format (.xlsb) Specification PDF | XPS Office DrawingOffice Drawing 97-2007 Binary Format Specification PDF | XPS Supporting Technologies |