Zoo

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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

Identification

Files have bytes DC A7 C4 FD at offset 20.

Compression

Known 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.

Software

Sample files

References

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