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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
QIC - Extension Details
Date Added: January 01, 1970
File Extension:  .QIC
Description 1: File extension .QIC is linked to the Windows Backup File. It is essentially a backup file that the backup utility included in both Windows 95 and 98 creates. QIC files are saved in QIC113 format and contain a set of files in a compressed archive. The files are expanded through the Windows Backup application when restored.
File Type:   Backup file
Mode: Binary
Program(s) to Open:  Windows: Windows Backup Utility
Common:
Extension: