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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:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
PRT - Extension Details
Date Added: September 10, 2008
File Extension:  .PRT
Description 1: .PRT is the file extension tied to the Dr. Halo printer driver. The .PRT files contain configuration info that enable computer systems to communicate with a particular printer or printers. Dr. Halos deviceindependent interchange file format is used to transport image data from one operating system or hardware environment to another. This format is linked to the Dr. Halo III paint application, HALO Image File Format Library and other Media Cyberneticswritten and marketed software.
Description 2: Other .PRT files are associated with a Printer Driver file. These files contain configuration info that let a computer communicate with a printer. The .PRT filetype may be utilized by a number of software programs. Dr. Halo software is one such example. It saves images in a format that is described as deviceindependent.
Description 3: A .PRT file is linked to outputs from printing jobs sent to a printer and saved as files. They contain formatting info that lets users know how a particular document ought to be printed. People can create PRT files on Unix operating systems using the FILEUTIL function together with a Filename parameter. The files can likewise be opened by FILEUTIL then printed using the line printer (LP) parameter.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  Unix: FILEUTIL
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