Expansion Unit for an Arithmetic and Control Unit

FIG. 1 is a front, top, right side perspective view of an expansion unit for an arithmetic and control unit showing our new design; FIG. 2 is a rear, bottom, left side perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a top view thereof; FIG. 6 is a bottom view thereof; FIG. 7 is a right side view thereof; FIG. 8 is a left side view thereof; and, FIG. 9 is an enlarged view of portion 9 shown in FIG. 8 . The broken lines in the drawings are for the purpose of illustrating portions of the expansion unit for an arithmetic and control unit that form no part of the claimed design. The dash-dot broken lines define the bounds of the claimed design and form no part thereof. The dot-dot-dash broken lines represent the boundaries of the enlarged portion and form no part of the claimed design.