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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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CAL - Extension Details
Date Added: March 01, 2009
File Extension:  .CAL
Description 1: .CAL file extension is linked with CALS Raster Group 1 image format it is bitmapdefined file format by the U.S. Dept. of Defense and used for monochrome image storage. 2 types of CALS files: type1 single image storage per file/data using compressed CCITT Group4; type2 multiple image storage per file/data using uncompressed or compressed CCITT Group4. .CAL file extension is associated with Corel Paint Shop Pro Photo X2 from Corel Corporation.
Description 2: .CAL file extension is linked with CakeWalk Application Language Script. This is the file extension for the script file utilized by CakeWalk products such as Music Creator a professional music tool that offers users [newbie or pro] with the right tools, effects and instruments they need to create, edit, record, mix and promote. It is also an easytouse, fun and affordable software.
Description 3: .CAL file extension is linked with HTML Calendar Maker Pro File. This is the file extension utilized by HTML Calendar Pro an application specifically designed for ease of use. Typing of events can be done quickly and easily, and transformation into customized and professional monthly calendar is done in seconds.
Description 4: .CAL file extension is linked with Microsoft Schedule Data. This is the file extension for the schedule data utilized by Microsoft Schedule+ a timemanagement software which was incorporated into MS Outlook 97. This application was intended as companion application to MS Mail, but later it became a companion to MS Exchange and was also a component of MS Office 95. Later it became a component of MS Exchange Client and Windows Messaging. Though Schedule+ was discontinued, it became a part of Ms Office up to Office 2003.
Description 5: .CAL file extension is linked with Calendar File. This is the calendar which is created and utilized by various calendar creation applications. It includes dates, events and custom images, as well as userdefined formatting. The standard .CAL file format is supported by various programs. It is developed by Broderbund, and it opens directly.
Description 6: .CAL file extension is linked with Daqarta Extended Audio Data. This is the file extension for the extended audio data utilized by Daqarta is an application that utilizes your Windows sound card to produce highperformance FFT spectrum analysis and waveform, signal averaging, color spectograms, advanced options for personal/lab use and signal generation. .CAL file extension and Daqarta are owned and developed by Interstellar Research.
File Type:   Audio & Music File
Mode: Binary
Program(s) to Open:  Windows: Daqarta
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