We envision a nomadic model of interaction where
the personal computer fits in your pocket. Such a
computer is extremely limited in screen space. A
technique is described for “spilling” the display of a
hand held computer onto a much larger table top
display surface. Because our model of nomadic
computing frequently involves the use of untrusted
display services we restrict interactive input to the
hand held. Navigation techniques such as scrolling or
turning the display can be expressed through the table
top. The orientation and position of the hand held on
the table top is detected using three conductive feet
that appear to the touch table like three finger touches.
An algorithm is given for detecting the three touch
positions from the table’s sensing mechanism.