PAQ family is a series of open source data compression archivers that have evolved through collaborative development to top rankings on several benchmarks measuring compression ratio although at the expense of speed and memory usage.

This package includes program zp (a ZPAQ archiver), a proposed standard format for highly compressed data that allows new compression algorithms to be developed without breaking compatibility with older programs.

Note: zp is the "user friendly" version of zpaq(1) archiver. Zp comes with 3 prebuilt and optimized compression levels. It does not require configuration file for min, med, max compression levels.