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