{TAIL ~ An alternative method} of line selection is illustrated in FIG 20 in which the switch panel contains {HEAD ~ only 4 switches} 61, 63, 63, 64 and a line count display 65 
{ TAIL ~ An alternative method } of line selection is illustrated in FIG 20 in which the switch panel contains { HEAD ~ only 4 switches } 61 , 63 , 63 , 64 and a line count display 65
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH