File Extension List
New applications are always being created and it is essential for our system to be able to tell what kind of file it is accessing. That is exactly what a file extension is for!
To detect which program to open a file with, your computer first gathers the required information by examining the files extension. A files extension carries clues to the data format of the file and what variety of information it contains. For example, many general file extensions include: .gif for images, .rar for packed files, and .mov for movies. You may already be familiar with these general extensions but with the always growing library of software and operating systems there are much more that you may have never discovered.
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