Bit-Pad-1 4-Button Puck
Bill Buxton's NotesThis puck is special to me as it is the first puck I ever used in interactive graphics. The special part of the design is the diamond shape of the button layout. Notice that it doesn't matter if you use your left hand or your right hand. The button that will lie under your index finger is the leading button. For that button at least—the most important one—there is none of the left-versus-right confusion that we have with multi-button mice.