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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
LID - Extension Details
Date Added: May 01, 2009
File Extension:  .LID
Description 1: .LID file extension is linked with Scholars Aid Library Backup file. This is the file extension for the library backup file utilized by Scholars Aid an application developed by a seminarian in 1996 to help him organize bibliography without the usual high costs of software solutions. The seminarian had a 20year programming experience that helped him develop superb and costeffective software that helped him meet his needs and others [students and scholars].
File Type:   Backup File
Mode: Binary
Program(s) to Open:  Windows: Scholars Aid
Common:
Extension: