HMP

from The Free On-line Dictionary of Computing (8 July 2008)

hybrid multiprocessing
HMP

   <parallel> (HMP) The kind of {multitasking} which {OS/2}
   supports.  HMP provides some elements of {symmetric
   multiprocessing}, using add-on {IBM} software called MP/2.
   OS/2 SMP was planned for release in late 1993.

   (1995-03-19)