A display control unit controls display of {HEAD ~ the data} processed by {TAIL ~ data processing unit} on a display terminal 
processed by
A display control unit controls display of { HEAD ~ the data } processed by { TAIL ~ data processing unit } on a display terminal
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH