{HEAD ~ The display} is fully visible to {TAIL ~ a user} whether the portable terminal is open or closed 
{ HEAD ~ The display } is fully visible to { TAIL ~ a user } whether the portable terminal is open or closed
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH