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
IDL - Extension Details
Date Added: January 01, 1970
File Extension:  .IDL
Description 1: .IDL file extension is linked with CRiSP Harvest File. This is the file extension utilized by CRiSP Harvest a userfriendly computer model which stimulates the harvest of 30 Chinook salmon stocks over an extended time by 25 fisheries. The models geographic range extends from Southeast Alaska to the Oregon coast. 2 fisheries and 10 stocks from the Columbia River basin are also included in the model. CRiSP Harvest is freelydistributed software and it is owned and developed by School of Aquatic & Fishery Sciences, University of Washington.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: CRiSP Harvest
Common:
Extension: