so ro ba pa bac an abacusalso called counting frameis calculating tool used in many cultures long before electronic calculators were invented figure - shows the japanese form of the abacuscalled soroban each wire represents place in positional numeral systemand the beads on the wire represent the digit at that place for examplea soroban with two beads moved over on the rightmost wire and three beads moved over on the second-to-rightmost wire would represent the number this program simulates soroban (the irony of using computer to simulate pre-computer computing tool is not lost on me