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File Extension List

New software is always being created and it is essential for our system to know how to tell what sort of file it is accessing. That is precisely what a file extension is for!

To determine which program to load a file with, your personal computer first collects the needed information from the files extension. A files extension contains hints to the format of the file and what kind of information it carries. A few of the more general file extensions include .exe for executables, .mp3 for sound, and .txt for plain text. You may already be familiar with these general extensions but with the always growing library of programs and operating systems there are much more that you might have never discovered.

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