doc

.doc (an abbreviation of "document") is a filename extension used for word processing documents stored on Microsoft's proprietary Microsoft Word Binary File Format. Microsoft has used the extension since 1983. Microsoft Word Binary File Format Binary DOC files often contain more text formatting information (as well as scripts and undo information) than some other document file formats like Rich Text Format and Hypertext Markup Language, but are usually less widely compatible. The DOC files created with Microsoft Word versions differ. Microsoft Word versions before Word 97 ("8.0") used a different format from the OLE and CFBF-based Microsoft Word 97 – 2003.