A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

(DOCument file) The default file format in a version of Word, Microsoft's word processing application prior to Microsoft Office 2007. DOC files use a .DOC extension and differ from text files (.TXT ...

A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

The DOCM file format was introduced in Microsoft Word 2007 as an improvement to the previous DOC format. DOCM uses Extensible Markup Lanugage, or XML, for better security, smaller file sizes and ...