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