The non volatile memory may be {TAIL ~ reprogrammable non volatile memory} organized into distinct blocks of {HEAD ~ simultaneously erasable cells} 
The non volatile memory may be { TAIL ~ reprogrammable non volatile memory } organized into distinct blocks of { HEAD ~ simultaneously erasable cells }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD