In the open position, {HEAD ~ the display} is unobstructed by {TAIL ~ the keyboard unit} 
is unobstructed by
In the open position , { HEAD ~ the display } is unobstructed by { TAIL ~ the keyboard unit }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL