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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
A - Extension Details
Date Added: August 02, 2009
File Extension:  .A
Description 1: .A file extension is linked with Static Libraries that contain headers and functions which may be referenced by C or C++ source files. .A files may also carry some functions or a library of functions [i.e. 3D modeling engine]. Static libraries usually result to larger program files; however, loading time is faster than dynamic libraries.
Description 2: .A file extension is linked with Jabbim [Jabber Client] File. This is the file extension for the Jabber client file utilized by Jabbim a communication client over XMPP/Jabber protocol, and it is written in Python language using PyQT 4.3, Qt 4.3 and Pyxl library, as a component of the client. Jabbim client aims to make Jabber more approachable and friendly for beginners and common users.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows: Jabbim
Common:
Extension: