The DOT file is a document file often linked to Microsoft's word processor. It has pre-formatted settings, font styles, defined headers and footers, and popular formatting styles. You'll rely on this file to create multiple documents using a standard format, assuring you of an identical look in the long run. It is an excellent choice for correspondence, mainly via letters, memos, and invoices. While you can create personal templates using this file, the original template remains unchanged. Multiple programs can help open DOT files. They include Microsoft Word 2013 and above, Microsoft Works, Microsoft Word Viewer, Planamesa NeoOffice, and Apache OpenOffice.