{HEAD ~ system status} holding {TAIL ~ means} for holding information indicating the status of the computer system 
holding
{ HEAD ~ system status } holding { TAIL ~ means } for holding information indicating the status of the computer system
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH