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