The present invention relates generally to devices for interacting with computer systems, and in particular, to a device which may be used to render {HEAD ~ otherwise passive surfaces} audiovisually interactive via {TAIL ~ invisible surface codings} 
audiovisually interactive via
The present invention relates generally to devices for interacting with computer systems , and in particular , to a device which may be used to render { HEAD ~ otherwise passive surfaces } audiovisually interactive via { TAIL ~ invisible surface codings }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL