{HEAD ~ means} for indicating {TAIL ~ the halting} of the actuation of the plurality of assignable user actuated switches or keys; and 
{ HEAD ~ means } for indicating { TAIL ~ the halting } of the actuation of the plurality of assignable user actuated switches or keys ; and
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH