{TAIL ~ An arithmetic logic unit} is arranged to receive the signals from {HEAD ~ the registers} and to add the numbers together to form a resultant 
{ TAIL ~ An arithmetic logic unit } is arranged to receive the signals from { HEAD ~ the registers } and to add the numbers together to form a resultant
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH