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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
ADR - Extension Details
Date Added: January 02, 2009
File Extension:  .ADR
Description 1: .ADR file extension is linked with Adress PLUS SQL Database. This is the file extension for the database utilized by Adress PLUS SQL a sophisticated application package which supports the professional CRM with processoriented solutions. It supplies predefined and readytouse interfaces based on standards. It ensures efficient handling and immediate processing of data and maintenance. .ADR file extension and Adress PLUS SQL are owned and developed by CobraComputer Brainwave DmBH.
Description 2: .ADR file extension is linked with Address Book. This is the file extension utilized by some programs that employ address books such as Smart Address a contact management program that provides users powerful features that lets them manage, consolidate and build their contact info into a single place. It also offers multiuser capabilities that allow users to share their info to their contacts. Smart Address runs on Windows and it is owned and developed by X2Net.
Description 3: .ADR file extension is linked with Opera Bookmarks File. This is the file extension for the list of bookmarks created by Opera Web Browser is a web browser and internet suite that handles common internetrelated tasks [i.e. displaying web sites, IRC online chatting, downloading files, sending and receiving emails, reading web feeds and managing contacts. Opera is free for PCs and mobile phones only.
File Type:   Internetrelated Fle
Mode: Binary
Program(s) to Open:  Windows & Mac: Opera Web Browser
Common:
Extension: