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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
GCD - Extension Details
Date Added: August 02, 2009
File Extension:  .GCD
Description 1: .GCD file extension is linked with Prassi CD Image. .GCD files carry the duplicate copies of CD data. These files are created using Prassi disc imaging software. Prassi GlobalCD is an application used for creating files for CDs and DVDs. .GCD file extension and Prassi GlobalCD are owned and developed by Prassi Software.
Description 2: .GCD file extension is linked with Groove Component Download File. This is the file extension for the component download file utilized by Groove Virtual Office a peertopeer collaborative software that is geared towards teams with regularly offline members or those who do not share similar network security clearance/s. .GCD file extension and Groove Virtual Office are owned and developed by Microsoft Corp.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows: MS Groove Virtual Office
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Extension: