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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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CAP - Extension Details
Date Added: March 11, 2008
File Extension:  .CAP
Description 1: .CAP file extension is linked with Packet Capture File. This file conatins packets that have been collected by a packetsniffing program. It saves the captured raw data via transmission. It is also referred to as bone file or trace file, and it is utilized by packer sniffer programs. The standard CAP file format is supported by various applications and the file opens directly.
Description 2: .CAP file extension is linked with ProComm/Telix Session Capture File. This is the capture file generated by Telix for Windows is the first version for Windows after the popular Telix for DOS communications program, and it is the second mostwidely used communication program of today. It is has a fullywindowed terminal emulator which includes VT220, RIPscrip, ANSI and WYSE75 terminals. Other features: 2 scripting languages, call costing and phone bill estimation, fullcolor resizable concurrent scrollback buffer, script recording, phonebook manager, and many others. .CAP file extension and Telix for Windows are owned and developed by deltaComm Development Inc.
Description 3: .CAP file extension is linked with CaptionMaker Caption File. This is the document file that contains subtitles or captions utilized by CaptionMaker captioning software that is used to create accessible media for the hearingimpaired. CaptionMaker has both versions for Windows and Mac to allow users to caption any DV video in their computers without the aid of external closedcaption encoder.
Description 4: .CAP file extension is linked with Code Architect Project File. Code Architect is an application which allows users to configure and customize data or codes. These codes may be in created in the following languages: C, Pascal, Visual C++, and Modula2. The data generated can be in any textbased format. .CAP file extension and Code Architect are owned and developed by Embedded Systems Academy.
Description 5: .CAP file extension is linked with Capella Music Sheet Data File. This is the music sheet data file utilized by Capella a musicbased tool that helps users write complicated scores and songs. There are more than 250 thousand users of Capella because it offers smart and easy way to write musical scores without the hassles of music manuals and other paperwork. .CAP file extension and Capella are owned and developed by Capella Software.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows & Mac: Capella
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