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