{HEAD ~ The output} from the computer may be displayed in {TAIL ~ real time} in various monitors 28, then also may be output to a permanent record 30 
{ HEAD ~ The output } from the computer may be displayed in { TAIL ~ real time } in various monitors 28 , then also may be output to a permanent record 30
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH