ARJ
| Filename extension | 
.arj | 
|---|---|
| Uniform Type Identifier (UTI) | public.archive.arj | 
| Developed by | Robert K. Jung | 
| Initial release | 1991 | 
| Latest release | |
| Type of format | archive format | 
| Open format? | Yes (patent expired) | 
| Website | www | 
ARJ (Archived by Robert Jung) is a software tool designed in 1991 by Robert K. Jung for creating high-efficiency compressed file archives. ARJ is currently on version 2.86 for MS-DOS and 3.20 for Microsoft Windows and supports 16-bit, 32-bit and 64-bit Intel architectures.
ARJ was one of many file compression utilities for MS-DOS and Microsoft Windows during the early and mid-1990s. Parts of ARJ were covered by U.S. patent 5,140,321 (expired). ARJ is well-documented and includes over 150 command line switches.