:The Psion pad, unlike the touchpads used in modern notebooks, was an absolute-position system. As the link says, "The pad corresponds to the screen..." The Psion tap-to-point design did not catch on, however, the Apple stroke-to-point design has. Both are probably significant. (unknown user) 
 The article should have info on what was the first device to use the current "standard" touchpads and also the first laptop to do so. The psion didn't function the same as current laptop touchpads. (I mean first device as well as first laptop.)   

 == Two-finger-stuff ==