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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
NOT - Extension Details
Date Added: January 01, 1970
File Extension:  .NOT
Description 1: .NOT is an extension associated with the NoteIt Note File from Veign. NoteIt delivers enhanced desktop notes that can persist throughout Windows sessions. This type of file affords users control over the look and feel, lets them save as well as open notes, and even have transparency control. The NOT files store all info concerning notes utilized in the NoteIt program application.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  Open with NoteIt Note File program
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