Similarly, a memory access refers to {TAIL ~ either a memory read} or {HEAD ~ a memory write operation} 
Similarly , a memory access refers to { TAIL ~ either a memory read } or { HEAD ~ a memory write operation }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD