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