LzwPak

LzwPak (also written Lzwpak) is a menu-driven file compression utility for DOS. Not much is known about it.

It supports two compressed file formats, which are presumably native to it:
 * "LZW" (.LZW) (presumably an implementation of LZW compression)
 * "PAK" (.PAK) (See PAK for more formats with that name.)

Identification
LZW: Unknown.

PAK: More research needed. Some or all PAK files start with bytes.