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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
GEM - Extension Details
Date Added: May 09, 2008
File Extension:  .GEM
Description 1: .GEM file extension is linked with McAfee VirusScan AV Pattern Update. This is the file extension for the virus patterns utilized by McAfee antivirus software an effective PC security and protection software that works fulltime. It has been in the industry for a decade and has more than 130 million customers across the globe.
Description 2: .GEM file extension is linked with Ventura Publisher GEM Vector. GEM graphics interface was popular during the 1980's and metafile storage was in its native format. This format records the GEM drawing sequence. Graphic file was developed by Ventura Publisher, which was then acquired by Xerox, then Corel in 1993. .GEM file extension is associated with applications such as HiJaak from HALLoGRAM Publishing and GEM Draw from Deltasoft.
File Type:   Vector Graphic File
Mode: Binary
Program(s) to Open:  Windows: Corel Ventura
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