Each user process is operative to retrieve a requested title from two or more of the processors via the backbone switch and to assemble a requested title for {HEAD ~ delivery} to {TAIL ~ a requesting subscriber location} 
to
Each user process is operative to retrieve a requested title from two or more of the processors via the backbone switch and to assemble a requested title for { HEAD ~ delivery } to { TAIL ~ a requesting subscriber location }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL