Given that tilting the PowerBook in various directions can be mapped to mouse or keyboard input (say, the arrow keys), one could readily us this feature for purposes such as:
? Panning across large maps (consider Google Maps: you slightly tilt the PowerBook backwards to go North, tilt it slightly to the left to go East, and so on)
? Vertical and horizontal scrolling in general, say, in a web browser
? Input for games (for example, a flight simulator)
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