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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:
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BAG - Extension Details
Date Added: March 11, 2008
File Extension:  .BAG
Description 1: .BAG file extension is linked with Emperor: Battle for Dune Game File. This is the game archive which may contain music, models, sounds, maps and others, which are utilized by Emperor: Battle for Dune is a computer war game which allows players to experience and become the leader of the land. The game features various animations in the form of landscapes, unique characters and many more. .BAG file extension and Emperor: Battle for Dune are owned and developed by Electronic Arts Inc.
Description 2: .BAG file extension is linked with PMMail 2000 Mail Index File. This is the file extension for the mail index file utilized by PMMail 2000 a powerful and flexible email application which provides extensive support for rising internet standards that offers userfriendly interface. Other features include: simple to understand interface both expert and newbie, costeffective and timesaving. PMMail 2000 is owned and developed by Blueprint Software Works Inc.
Description 3: .BAG file extension is linked with AOL 6 Organizer File. This is the file extension for the organizer file utilized by AOL Organizer an organizing tool/application that helps user in their daily online routines and schedules. It is a simplified, organizing tool that lets users fix their online routines even if their realtime tasks are chaotic and hectic.
Description 4: .BAG file extension is linked with OS/2 Netfinity Manager Sysinfo File. This is the file extension for the sysinfo file utilized by OS/2 an operating system which was initially developed by IBM and Microsoft, then later by IBM exclusively. OS/2 stands for "Operating System/2 since it was introduced as part of IBMs "Personal System/2, which is a secondgeneration PC. IBM is no longer marketing OS/2 but currently, it is being sold under the name eComStation by Serenity Systems.
Description 5: .BAG file extension is linked with AOL Instant Messenger [AIM] Buddy List. This is the buddy/contact list utilized by AOL Messenger which contains contact information. AIM or AOL Instant Messenger is a nonexclusive application which offers instant messaging to all internet users across the globe. It allows users to communicate privately, have personalized text messages and has a tool that tells whether user is online. .BAG file extension and AIM are owned and developed by AOL.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows & Mac: AIM
Common:
Extension: