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