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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
TRN - Extension Details
Date Added: January 01, 1970
File Extension:  .TRN
Description 1: File extension .TRN is linked to the Medline Payroll Software related files. It is attached to software packages for employers as well as payroll service providers. This file format helps in managing payroll along with payroll taxes. Medlin Accountings Payroll Software is an application associated with the .TRN extension. The Payroll Software is capable of preparing payroll for both single and multiple employers, storing close to 5,000 employees per employer.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Associated application: Payroll Software from Medlin Accounting
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