|Uniform Type Identifier (UTI)||public.archive.arj|
|Developed by||Robert K. Jung|
|Type of format||archive format|
ARJ (Archived by Robert Jung) is a software tool designed by Robert K. Jung for creating high-efficiency compressed file archives. ARJ is currently on version 2.86 for DOS and 3.20 for Windows and supports 16-bit, 32-bit and 64-bit Intel architectures.
ARJ was one of two mainstream archivers for DOS and Windows during the early and mid-90s, with PKZIP being its competition. Parts of ARJ were covered by U.S. Patent 5,140,321. Generally ARJ was less popular than PKZIP, but it did enjoy a niche market during the BBS era and in the warez scene. This was largely due to ARJ's creation and handling of multi-volume archives (archives which are split into smaller files which are then suitable for dial-up transfers and floppy distribution) being more robust than PKZIP's.
In recent times, other alternatives to the ZIP archive, such as RAR or 7-Zip have surpassed ARJ in market share; the lack of an official graphical version may have contributed to ARJ's decline.
File format support in other software
ARJ compressed files with the extension .arj can be unpacked with various modern tools other than the original ARJ software. There exists a free software re-implement of the tool. The software 7-Zip can also unpack .arj files.
- JAR, an archiver by the same author
- List of archive formats
- List of file archivers
- Comparison of file archivers
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