A storage medium may be coupled to a processor such that {HEAD ~ the processor} can read information from, and write {TAIL ~ information} to, the storage medium 
write
A storage medium may be coupled to a processor such that { HEAD ~ the processor } can read information from , and write { TAIL ~ information } to , the storage medium
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH