Zoo

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|2 || LZH || [[LZ77 with Huffman coding|LZ77+Huffman]]. Nearly identical to [[LHA]]'s "lh5" method. A small difference is that Zoo defines a way to mark the end of data.
 
|2 || LZH || [[LZ77 with Huffman coding|LZ77+Huffman]]. Nearly identical to [[LHA]]'s "lh5" method. A small difference is that Zoo defines a way to mark the end of data.
 
|}
 
|}
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== Specifications ==
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* [https://www.fileformat.info/format/zoo/corion.htm The ZOO Archive File Format] from Corion.net, via FileFormat.info
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* [http://apple2.org.za/gswv/a2zine/GS.WorldView/Resources/The.MacShrinkIt.Project/ARCHIVES.TXT Archive format info, including ZOO]
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* [http://www.textfiles.com/programming/FORMATS/arc_fmts.txt ZOO file header format (among other archive types)]
  
 
== Software ==
 
== Software ==
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* {{CdTextfilesURL|geminiatari/ZIP/PROGRAM/}} → *.ZOO
 
* {{CdTextfilesURL|geminiatari/ZIP/PROGRAM/}} → *.ZOO
  
== References ==
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== Links ==
 
* [[Wikipedia: Zoo (file format)]]
 
* [[Wikipedia: Zoo (file format)]]
* [https://www.fileformat.info/format/zoo/corion.htm The ZOO Archive File Format] from Corion.net, via FileFormat.info
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* {{CdTextfiles|rbbsv3n1/zzap/zooplan1.zip}} → ZOOPLAN1.TXT - A Zoo Manifesto (By Rahul Dhesi, 1986-11-01)
* [http://apple2.org.za/gswv/a2zine/GS.WorldView/Resources/The.MacShrinkIt.Project/ARCHIVES.TXT Archive format info, including ZOO]
+
* [http://www.textfiles.com/programming/FORMATS/arc_fmts.txt ZOO file header format (among other archive types)]
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* {{CdTextfiles|simtelctc/disk1/ZOO/UGUIDE.ZIP;1|The zoo Archiver User's Guide}}, by Bill Davidsen (for Zoo 2.01)
 
* {{CdTextfiles|simtelctc/disk1/ZOO/UGUIDE.ZIP;1|The zoo Archiver User's Guide}}, by Bill Davidsen (for Zoo 2.01)

Revision as of 19:55, 4 January 2021

File Format
Name Zoo
Ontology
Extension(s) .zoo
PRONOM x-fmt/269
Wikidata ID Q219983
Released 1986

Zoo is a compressed archive format developed by Rahul Dhesi. It was one of the many competing archive formats in the 1980s, and was based (originally) on LZW compression. It had some popularity with Open/VMS and Amiga systems, but didn't ultimately win out over ZIP.

Contents

Discussion

The Zoo software encompassed several different utilities, which were sometimes distributed individually, and which had their own version numbers.

  • Zoo - The main program
  • Ooz - Extractor
  • Booz (Barebones Ooz) - Extractor; some versions can also list files
  • Looz (Ooz with List) - Extract/list/execute
  • Atoz - Helper utility for converting other formats (ARC, LBR) to Zoo
  • Fiz - Analyze damaged Zoo files
  • Stuff - File finder
  • Sez - Self-Extracting Zoo utility

Identification

Files have bytes DC A7 C4 FD at offset 20.

Compression

Compression methods:

ID Name Description
0 No packing Uncompressed
1 LZD LZW
2 LZH LZ77+Huffman. Nearly identical to LHA's "lh5" method. A small difference is that Zoo defines a way to mark the end of data.

Specifications

Software

Sample files

Links

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