'unzoo' is a zoo archive extractor. A zoo archive is a file that
contains several files, called its members, usually in compressed form
to save space. 'unzoo' can list all or selected members or extract
all or selected members, i.e., uncompress them and write them to
files. It cannot add new members or delete members. For this you
need the zoo archiver, called 'zoo', written by Rahul Dhesi.