The method for using {HEAD ~ a foot based interface} to interact with {TAIL ~ a personal computer} is disclosed 
to interact with
The method for using { HEAD ~ a foot based interface } to interact with { TAIL ~ a personal computer } is disclosed
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH