The user interface 136 may be in communication with {TAIL ~ the controller} 137 via one or more signal lines or {HEAD ~ shared communication busses} 
The user interface 136 may be in communication with { TAIL ~ the controller } 137 via one or more signal lines or { HEAD ~ shared communication busses }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD