The system includes {HEAD ~ an uninterruptible power supply manager computer} coupled to a number of user computers via {TAIL ~ a computer network} 
coupled via
The system includes { HEAD ~ an uninterruptible power supply manager computer } coupled to a number of user computers via { TAIL ~ a computer network }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL