EXEPACK is a file compression tool that comes with MASM, It is able to reduce the storage required by about 30% compared to a standard Assembly EXE. Microsoft also uses EXEPACK with MS-DOS and their development tools.

EXEPACK can be invoked with LINK and there is a separate command line tool available as well.

Programs compressed with EXEPACK all run normally and the tool is transparent to MS-DOS users.