PCauthorities.com presents…
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
TST - Extension Details
Date Added: January 01, 1970
File Extension:  .TST
Description 1: Files with the extension .TST have to do with the preconfigured test file that TestPoint uses. TestPoint is software used for designing testing and measurement program applications. The program can also be utilized for such tasks as testing speed, voltage, electrical current, pressure as well as other scientific types of measurements.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Measurement Computing TestPoint
Common:
Extension: