FIG. 1 is a perspective view of front, top and right side of an arithmetic and control unit showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof, wherein the broken lines illustrate portions of the unit and form no part of the claimed design;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.