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