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