PCauthorities.com presents…
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
LOCK - Extension Details
Date Added: January 01, 1970
File Extension:  .LOCK
Description 1: .LOCK file extension is linked with .NET Framework Database Lock File. This is the file extension for the database lock file utilized by .NET Framework. .LOCK file defines the used database and prevents it to be altered by another application. .LOCK file extension is also associated with Microsoft Visual Studio an application that helps software developers and other users meet their software development challenges.
Description 2: .LOCK file extension is linked with Lock File. This file determines if an application is in use. It is utilized by Red Hat Linux. Linux is an operating system which was created initially as a hobby by Linus Trovalds; he was a student at the University of Helsinki in Finland. Linus was interested in Minix a small UNIX system and eventually decided to develop his own system which surpassed the standards of Minix. Linus started working on his system on 1991. On 1994, Linux Kernel ver. 1.0 was released. The fullfeatured version [Linux 2.6] was released in December 2003.
Description 3: .LOCK file extension is linked with Mozilla Firefox File. This is the file extension utilized by Mozilla Firefox a free web browser which comes from the Mozilla Application Suite. As of June 2008, Firefox had 19.03% of the recorded usage share of web browsers, which makes it secondmost popular web browser in the entire world. Its key features are: uses free Gecko engine, tabbed browsing, spellchecker, incremental find, download manager, live bookmarking and integrated search system.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows, Mac & Linux: Mozilla Firefox
Common:
Extension: