{TAIL ~ The user interface} 136 may include {HEAD ~ a display component}, such as a digital or analog display device designed to provide operational feedback to a user 
{ TAIL ~ The user interface } 136 may include { HEAD ~ a display component } , such as a digital or analog display device designed to provide operational feedback to a user
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH