Soroban
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The soroban is an abacus developed in Japan. It is derived from the ancient Chinese suanpan, imported to Japan in the 14th century. Like the suanpan, the soroban is still used today, despite the proli
A modern soroban. The right side of the soroban represents the number 1234567890, each column indicating one digit, with the lower beads representing "ones" and the upper beads "fives".
A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each.
A dual soroban-calculator, Sharp Elsi Mate EL-8048 Sorokaru, produced from 1979
An abacus that uses colored sliders instead of beads. Red represents the value 5; green represents the value 1. The value in the abacus is 4025.
Abacus
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An abacus, also called a counting frame, is a hand-operated calculating tool which was used from ancient times, in the ancient Near East, Europe, China, and Russia, until largely replaced by handheld
Soroban
…The soroban (算盤, そろばん; counting tray) is an abacus developed in Japan. It is derived from the ancient Chinese suanpan, imported to Japan in the 14th century. Like the suanpan, the soroban is still used…
An early photograph of the Salamis Tablet.
Copy of a Roman abacus
Use of an abacus, as illustrated in Margarita philosophica (1503)
Russian schoty