ARJ

Archived by Robert Jung

Filename extension	.arj
Uniform Type Identifier (UTI)	public.archive.arj
Developed by	Robert K. Jung
Latest release	2.86 2012-05-01
Type of format	archive format
Open format?	Yes (patent expired)

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.^[1]

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.