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