zoo is a data compression program and format developed by Rahul Dhesi in the mid-1980s.
Program source code was originally published on the comp.sources.misc Usenet newsgroup, and was compatible with a variety of Unix-like operating systems.
Binaries were also published for the MS-DOS and AmigaOS user communities.
[1] Zoo archives can store multiple "generations" of a file; if files are added to an archive with the same pathname yet more recent date, if generations are enabled for the archive the older version(s) will be retained (with a semicolon and version number, similar to version numbers in the VMS and RT-11 operating systems) as the new file is added.
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