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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
NOTEBOOK - Extension Details
Date Added: January 01, 1970
File Extension:  .NOTEBOOK
Description 1: .NOTEBOOK is an extension linked to the Notebook created using SMART Board Tools. This file usually contains images, video, text and audio files, along with Flash animations and other objects. The .NOTEBOOK file is often seen used with the SMART Notebook whiteboarding program software for educational purposes. Use the free Notebook interactive viewer or other SMART Board program to view Notebook lessons.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Mac, Windows and Unix: SMART Technologies Notebook interactive viewer (free), SMART Technologies SMART Board software (commercial)
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