The invention enables random read and write operations into {HEAD ~ cells} in an array of {TAIL ~ a memory device} 
The invention enables random read and write operations into { HEAD ~ cells } in an array of { TAIL ~ a memory device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL