Operation of {HEAD ~ the various device components} and {TAIL ~ input keys}, etc., will be described further below with reference to FIG 8 
Operation of { HEAD ~ the various device components } and { TAIL ~ input keys } , etc . , will be described further below with reference to FIG 8
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH