The Free On-line Dictionary of Computing (30 December 2018):

PKLITE

    An executable file compression utility
   for MS-DOS from PKWARE, Inc..  PKLITE compresses the body
   of the executable and adds a small, fast decompress routine in
   the header.  In many cases it performs better than lzexe.
   With headpack the output is smaller and cannot be
   decompressed.

   (1999-01-07)