Pack (Unix)
From Just Solve the File Format Problem
pack is a command in Unix-style operating systems to compress files using Huffman coding. Files normally have a .z extension, appended to their names including any other extension they may already have in their uncompressed versions, e.g., file.txt.z.
See also
- compress - A compressed file format with a similar filename extension
Software
- gzip can uncompress pack files.