ARJ
From Just Solve the File Format Problem
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{{FormatInfo | {{FormatInfo | ||
|subcat=Archiving | |subcat=Archiving | ||
| − | |extensions={{ext|arj}} | + | |extensions={{ext|arj}}, {{ext|a01}}, ... |
|pronom={{PRONOM|fmt/610}} | |pronom={{PRONOM|fmt/610}} | ||
|wikidata={{wikidata|Q2693033}} | |wikidata={{wikidata|Q2693033}} | ||
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== See also == | == See also == | ||
| + | * [[ARJ-PROTECT data]] | ||
* [[JAR (ARJ Software)]] | * [[JAR (ARJ Software)]] | ||
* [[SARJ]] | * [[SARJ]] | ||
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|4 || compressed fastest || [[LZ77]] | |4 || compressed fastest || [[LZ77]] | ||
|- | |- | ||
| − | |8 || no data, no CRC || | + | |8 || no data, no CRC || |
|- | |- | ||
| − | |9 || no data || | + | |9 || no data || |
|} | |} | ||
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== Software == | == Software == | ||
| − | |||
* ARJ - Official compression/decompression software for DOS | * ARJ - Official compression/decompression software for DOS | ||
** {{CdTextfiles|nightowl/carrs/015A/ARJ013A.ZIP|v0.13a}} (1990-09-29) | ** {{CdTextfiles|nightowl/carrs/015A/ARJ013A.ZIP|v0.13a}} (1990-09-29) | ||
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** {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/ARJ241A.EXE|v2.41a}} (1993-07-10) | ** {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/ARJ241A.EXE|v2.41a}} (1993-07-10) | ||
** {{CdTextfiles|simtel/stmsdos9709/disk1/DISC1/ARCERS/ARJ250A.EXE|v2.50a}} (1995-12-12) | ** {{CdTextfiles|simtel/stmsdos9709/disk1/DISC1/ARCERS/ARJ250A.EXE|v2.50a}} (1995-12-12) | ||
| + | ** {{CdTextfiles|ftp.wwiv.com/pub/GENUTIL/arj260.exe|v2.60}} (1997-11-16) | ||
** [http://www.filegate.net/compress/arj271.exe v2.71] (1999-12-19) | ** [http://www.filegate.net/compress/arj271.exe v2.71] (1999-12-19) | ||
** [https://www.sac.sk/download/pack/arj286.exe v2.86] (2012-01-02) | ** [https://www.sac.sk/download/pack/arj286.exe v2.86] (2012-01-02) | ||
| + | ** [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=779 Various versions at old-dos.ru] | ||
* ARJ32 - Official compression/decompression software for Windows console | * ARJ32 - Official compression/decompression software for Windows console | ||
** [http://www.filegate.net/compress/arj32v3j.exe v3.04] (1999-12-19) | ** [http://www.filegate.net/compress/arj32v3j.exe v3.04] (1999-12-19) | ||
** [https://www.sac.sk/download/pack/arj32320.exe v3.20] (2012-01-02) | ** [https://www.sac.sk/download/pack/arj32320.exe v3.20] (2012-01-02) | ||
| + | ** [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=1463 ARJ32 Various versions at old-dos.ru] | ||
* UNARJ - Official software, decompression only | * UNARJ - Official software, decompression only | ||
** {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/UNARJ241.ZIP|v2.41}} (1993-04) - Source code + DOS binary | ** {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/UNARJ241.ZIP|v2.41}} (1993-04) - Source code + DOS binary | ||
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* [[Konvertor]] | * [[Konvertor]] | ||
| − | ''Ed. note: | + | ''Ed. note: Newer versions of unregistered ARJ/ARJ32 have a hard-coded expiration date, and may have a long delay when you run them (several minutes, if it's been a long time since expiration).'' |
== Sample files == | == Sample files == | ||
| Line 73: | Line 76: | ||
== Links == | == Links == | ||
* [[Wikipedia:ARJ|Wikipedia article]] | * [[Wikipedia:ARJ|Wikipedia article]] | ||
| + | * [http://www.arjsoftware.com/ Official homepage of ARJ software] | ||
Revision as of 16:47, 28 May 2022
ARJ is a compressed archive format, and associated software. It was developed by Robert Jung.
ARJ was one of the leading compression tools during the 1990s. While it was a bit slower than PKZIP, it sported many more options, some of which were unique during that time (archives over multiple disks/volumes, fine-tuning of the compression algorithms used based on the data that was being compressed, recovery records to recover from simple transmission errors, etc.).
Contents |
See also
Compression methods
| ID | Name | Description |
|---|---|---|
| 0 | stored | No compression |
| 1 | compressed most | LZ77+Huffman. For decompression purposes, these are all more-or-less compatible with LHA's "lh6" method. |
| 2 | ... | |
| 3 | ... | |
| 4 | compressed fastest | LZ77 |
| 8 | no data, no CRC | |
| 9 | no data |
Identification
An ARJ archive starts with signature bytes 0x60 0xea.
The full identification algorithm used by the ARJ software is given in its technical documentation.
Specifications
- The ARJ/UNARJ distributions include detailed format information, in a file named TECHNOTE.TXT or similar.
- A copy of the 2001-09 version (with an addendum of some sort)
- The ARJ Archive File Format, from fileformat.info and Corion.net
Software
- ARJ - Official compression/decompression software for DOS
- ARJ32 - Official compression/decompression software for Windows console
- v3.04 (1999-12-19)
- v3.20 (2012-01-02)
- ARJ32 Various versions at old-dos.ru
- UNARJ - Official software, decompression only
- 7-Zip
- Open-source ARJ
- Konvertor
Ed. note: Newer versions of unregistered ARJ/ARJ32 have a hard-coded expiration date, and may have a long delay when you run them (several minutes, if it's been a long time since expiration).
Sample files
- http://cd.textfiles.com/20mnn/HPTEXT/PHRACK/
- The Silver Collection CDs have many ARJ files
- http://cd.textfiles.com/goldmedal/
