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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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MAT - Extension Details
Date Added: March 11, 2008
File Extension:  .MAT
Description 1: .MAT file extension is linked with ArcView Geocoding Matching Parameters File. This is the file extension for the Geocoding matching parameters file utilized by ArcView a GIS [geographic information system] program which is used for visualizing, analyzing, creating and managing geographical data. Other features include: quality mapping, spatial analysis, data use and integration, readtouse datasets, GIS deployment, map viewing and navigation, data query and exploration, and map printing. ArcView is owned and developed by ESRI.
Description 2: .MAT file extension is linked with MATLAB Variables Binary File. It carries the binary data used by MATLAB. MAT files may include variables, arrays, data [other forms] and functions. MAT files can be saved using different formats and it can be done by choosing a version from MATLAB Preferences. MAT files may be used to represent 64bit audio floating point, 8bit unsigned integer an 16bit signed integer formats. .MAT file extension is also associated with Awave Studio from FMJSoftware. .MAT file extension and MATLAB are owned and developed by MathWorks, Inc.
Description 3: .MAT file extension is linked with Ox Objectoriented Matrix Programming Language File. This is the file extension for the matrix programming language file utilized by Ox Professional an objectoriented statistical system which has a powerful matrix language that is accompanied by a comprehensive statistical library. It is fast, has a welldesigned syntax and editor and graphics facilities. It can read/write different data formats [spreadsheets, OxMetrics files, etc.]. Ox Professional is owned and developed Jurgen A. Doornik.
Description 4: .MAT file extension is linked with Poser 3D pose File. This file carries the source code/s when rendering graphics for Poser an application that allows users to easily design human form in 3D. It utilizes powerful rendering and rich content collection. Key features include: powerful rendering capabilities, complete 3D figure design, dynamic hair and cloth, animation controls, and 3D content.
Description 5: .MAT file extension is linked with 3D Studio Max File. This is the file extension utilized by Autodesk 3D Studio Max a 3D graphics and animation application. It may include textures, shading effects, polygon shapes and lighting. This application is now renamed 3ds Max and it usually saves files with .3ds file extension. .MAT file extension and 3D Studio Max are owned and developed by Autodesk Software.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows: Autodesk 3ds Max
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