53. The apparatus of claim 36 wherein the system further includes a display area; further comprising a cursor movement device for moving a cursor on the display area along a cursor path responsive to the user movement; and wherein the first quantity is further a function of the cursor path.
53. The apparatus of claim 36 wherein the system further includes a display area; further comprising a cursor movement device for moving a cursor on the display area along a cursor path responsive to the user movement; and wherein the first quantity is further a function of the cursor path. 54. The apparatus of claim 53 wherein the cursor path is a function of any one of: (1) a velocity indicated by two or more of the successive locations; (2) an acceleration indicated by three or more of the successive locations; (3) a distance between the particular region and a third location, the third location being one of the successive locations indicated by the user movement; and (4) a difference between the time a third location occurs and the time a fourth location occurs, each of the third and the fourth locations being one of the successive locations indicated by the user movement.