manipulate archives of files in compressed form ソース
Zoo is used to create and maintain collections of files in
compressed form. It uses a Lempel-Ziv compression algorithm
that gives space savings in the range of 20% to 80% depend-
ing on the type of file data. Zoo can store and selectively
extract multiple generations of the same file. Data can be
recovered from damaged archives by skipping the damaged por-
tion and locating undamaged data with the help of fiz(1).