FIG. 1 is a perspective view of a track ball showing my new design.

FIG. 2 is a front elevational view of the track ball embodying the design.

FIG. 3 is a plan view of the track ball, as shown in FIG. 2.

FIG. 4 is a bottom view of the track ball, as shown in FIG. 2.

FIG. 5 is an end elevational view of the track ball as appearing from the rightward end in FIG. 2.

FIG. 6 is an end elevational view of the track ball as appearing from the leftward end in FIG. 2.

FIG. 7 is a rear elevational view of the track ball, as shown in FIG. 2.

FIG. 8 is a perspective view showing the track ball, a TV display unit and a processing unit being shown with associated connecting cables in broken lines for illustrative purposes only.