Abacus

Description

FIG. 1 is a top plan view of an abacus showing my new design, the bottom view being substantially identical thereto;

FIG. 2 is a side elevational view of the abacus shown in FIG. 1, the opposite side being substantially identical thereto; and

FIG. 3 is an end elevational view of the abacus shown in FIG. 1, the opposite end being substantially identical thereto.