{HEAD ~ 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 {TAIL ~ delivery} to a requesting subscriber location 
{ HEAD ~ 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 { TAIL ~ delivery } to a requesting subscriber location
HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH