File extension docx and m4v file

In general in casual operating system there exist lots and lots of file extensions for its own purpose. The purpose may be with application software or system software or with operating system itself. Many of the file formats are well known by us and easily identifiable by us, even we can rightly tell the application corresponding to those file formats. Yet probably there is lots of chance for a system user to experience with a new and unfamiliar file format. This critical situation arises when the user tries to install new software or tries to delete the unwanted files in order to gain hard disc space. m4v file is one such unfamiliar file format we come across. m4v files are standardized format particularly used for iPods and iPhones and for portable play stations. This file format is created by Apple. It has the direct link with MPEG4 file format.

docx File Description:

The file extension docx simply stands for document file; generated by Microsoft Word 2007. This is a word processing software or authorizing software provided with lots and lots of word processing and editing tools like cut, copy, paste, find, spell check, grammar, word and paragraph alignment and so on. This *.docx file extension cannot be opened and accessed by even by Microsoft Word application with older RC, because it supports the document in XML format too.