OS/2 PACK archive
From Just Solve the File Format Problem
OS/2 installation archive (official name unknown) is a family of compressed archive formats used for software installation on OS/2.
This article covers the format with signature bytes a5 96 fe ff. For signature a5 96 fd ff, see FTCOMP.
Apparently, OS/2 provides an UNPACK.EXE utility that can decompress the files.
[This article needs more research, or help from an expert.]
Identification
Files start with bytes a5 96 fe ff.
