Posted for "colyncase on earthlink" <colyncase@earthlink.net>:

 and a few more:
 
 LOP = lean of peak
 ROP = rich of peak
 ICP = internal cylinder pressure (I think, maybe instantaneous CP)
 PP = peak pressure
 TDC = top dead center
 theta PP = angle after  TDC where max pressure occurs
 TIT = Turbine inlet temperature

"""
  Wide Open Throttle = WOT
"""