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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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CAS - Extension Details
Date Added: March 11, 2008
File Extension:  .CAS
Description 1: .CAS file extension is linked with FLUENT Case File. This is the file extension for the case file utilized by FLUENT an application that offers broad physical modeling capabilities that applies to various industries such as glass productions, blood flow, semiconductor manufacturing, clean room design, wastewater treatment, and many more. FLUENT is an important engineering solution and analysis tool that provides extensive and comprehensive software tools. .FLUENT is owned and developed by ANSYS Inc.
Description 2: .CAS file extension is linked with i2 Case Notebook Timeline Analysis. This is the file extension for the case notebook timeline analysis utilized by i2 Analysts Notebook an awardwinning analytical and visualization tool that provides users the necessary tools for analyzing information within their charts. It also offers users to reference and include information from electronic data sources. Various agencies utilize i2 and these include defense, global commercial organizations and law enforcement.
Description 3: .CAS file extension is linked with Quest Compiled Adventure Game. This is the file extension for the compiled adventure game generated and utilized by Quest. Quest Adventure Game is a 1980s style text adventure which lets players create their own text adventures without the need for a programming degree. .CAS file extension and Quest Adventure Game are owned and developed by Alex Warren.
Description 4: .CAS file extension is linked with Commadelimited ASCII file. This file is possibly used for importing/exporting from one file format to another. .CAS file extension is associated with NotePad++ which is a free source code editor that supports various programming languages. NotePad++ runs on Microsoft Windows environment. NotePad++ features are as follows: syntax highlighting, autocompletion, multidocument, drag n drop support, zoom in and zoom out, macro recording and playback, and many others.
Description 5: .CAS file extension is linked with Atari Cassette Image File. This is the file extension for the cassette images utilized by Atari emulators such as WAV2CAS and CA2WAV [converts Atari cassette WAV file into .CAS format; can access images on real Atari via CAS2SIO using a SIO2PC interface original Atari disk drive/printer emulator for personal computers developed by Nick Kennedy].
Description 6: .CAS file extension is linked with Videoton TVC Computer Tape File. Videoton TVC was Hungarys version of the personal computer which was developed in the 80s. In 1984, the Videoton company purchased an older license from Enterprises manufacturer. In 1988, 3000 units of the 32k version and 9000 units of the 64k version of TVC were sold, typically for government orders under the School Computer Program.
Description 7: .CAS file extension is linked with Borland Combines C/Assembly Source Code. This is the source code file created using Borland Applications such as Borland C++ Builder the leading RAD C++ IDE. It offers full API support for Windows Vista OS. It offers users to quickly and visually build responsive and interactive datadriven web applications which support AJAX techniques.
Description 8: .CAS file extension is linked with BitDefender File. It is the file extension utilized by BitDefender an antivirus, antispyware and antispam application that is ranked #1 and winner of "Top TenReviews Gold Award. BitDefender is one of the most outstanding PC defense software of 2008. It offers users the following features: userfriendly interface; scans all existing computer files. incomingoutgoing emails, internet/network traffic and IM transfers.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows & Mac: BitDefender
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