| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0013]FIG. 1 is a pictographic side view of the main components of one embodiment of an optical, motion translation type screen pointer device according to the present invention. [0014]FIG. 2 is a graph illustrating typical velocity profiles for a mechanical pointing device, such as a track ball, and an optical pointing device. [0015]FIG. 3 is a block diagram illu
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