The second storing device may have limited memory capacity and {HEAD ~ the operator} can be informed of {TAIL ~ its capacity} prior to a final shut off of power 
informed of
The second storing device may have limited memory capacity and { HEAD ~ the operator } can be informed of { TAIL ~ its capacity } prior to a final shut off of power
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH