Microsoft Office
Introduction
"The Microsoft Office File Formats documentation provides detailed technical specifications for file formats implemented in certain Microsoft Office applications, including the binary file formats created by Microsoft Word, Microsoft Excel, and Microsoft PowerPoint and the Outlook Personal Folders (.pst) file format. Technical specifications for standards-based file formats implemented in Microsoft Office applications may be found in the Standards node of the Open Specifications library.
The Microsoft Office File Formats documentation also includes a set of companion introduction and reference documents that supplement the technical specifications with introductory information about the documentation set and technical reference information.
The Office File Formats documentation is also available as a download package in .zip file format."
- Microsoft Office File Formats (msdn.microsoft.com)
