dotm A .dotm extension file is a Macro-Enabled Template file that is created using the Microsoft Word Processor. The .docm file format is very useful in corporate offices and large-scale business where there is a need for mass communication to be sent out in a standard format. In such cases, a template can be created with all the standard specifications and formatting. Macros can be written to execute a set of standard commands, and the template can be saved and used, this saves time by eliminating the need to type or do the same tasks over and over again.
txt From the 70's to 2007 the open source .txt filename extension format commonly referred to plain text documents encoded using the ASCII character set. To support internationalization and localization, .txt text documents are today text files encoded using the UTF-8 or UTF-16LE standard which is a superset of the ASCII character set. Text documents of type .txt typically have minimal formatting for example no support for bold or italic characters or support for bullet points etc. This allows .txt documents to use minimum storage space and be platform independent as long as the operating system supports the underlying encoding character set used to create the .txt document. On windows .txt file support has existed since 1985 when Windows 1.0 was released and since then has been mostly associated with the notepad application on Microsoft Windows.