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