The viewer may also include memory into which a file or {HEAD ~ files} are downloaded for {TAIL ~ subsequent viewing} 
The viewer may also include memory into which a file or { HEAD ~ files } are downloaded for { TAIL ~ subsequent viewing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL