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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
APL - Extension Details
Date Added: January 01, 1970
File Extension:  .APL
Description 1: .APL file extension is linked with ArcPad Layer File. This is the file extension for the layer file utilized by ArcPad version 6. ArcPad is a program designed for mobile GIS and field mapping applications that are used in handheld and mobile devices. It provides fieldbased users/personnel with the capability to capture, display and analyze geographic information minus the need for expensive and outofdate paper map books. ArcPad is owned and developed by ESRI.
Description 2: .APL file extension is linked with Monkeys Audio Image Link. This is the file extension for the image link utilized by Monkeys Audio a fast and easy solution for compressing digital music. This application uses lossless compression algorithm which guarantees the original quality of the audio. It also saves memory space while making bitbybit copies of your favorite music. Monkeys Audio is owned and developed by Matthew T. Ashland.
File Type:   Audio and Music File
Mode: Binary
Program(s) to Open:  Windows: J. River Media Center, JMAC, Monkeys Audio [MAC], Nullsoft Winamp with Monkeys Audio Plugin; Mac: JMAC Java Monkeys Audio Decoder, SBooth Max
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