In {TAIL ~ the closed position} {HEAD ~ a portion} of the display is obstructed by the keyboard unit, and in the open position the display is unobstructed by the keyboard unit 
In { TAIL ~ the closed position } { HEAD ~ a portion } of the display is obstructed by the keyboard unit , and in the open position the display is unobstructed by the keyboard unit
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH