PACK reduces the size of a file by compressing its data. You can use PACK for a single file or for a group of files, thereby reducing the disk space required for your OS/2 application. UNPACK restores a packed file to it's original size.
In addition to the original versions of these utility programs, enhanced versions of the programs are also included with OS/2. These enhanced versions are named PACK2 and UNPACK2. The options, parameters, and function for PACK2 and UNPACK2 are identical to PACK and UNPACK. The only difference is that PACK2 has a better compression algorithm.
Note: PACK and PACK2 are shipped with the OS/2 Toolkit. UNPACK and UNPACK2 are shipped with OS/2.