What is the name of a calculating machine that originally consisted of beans or stones moved in grooves in sand or on tablets of wood, stone, or metal?
Abacus Calculation Russian abacus Abaci Nepohualtzintzin Abacus (Aztec) Cranmer abacus Abacuses Counting frame Abacus Abacist Abacus (mathematics) Abacists Bead frame Abacus arithmetic AbacuS Counting frames Abbacus Reckoning frame
counting frame abacuses abacist reckoning frame nepohualtzintzin abacists abacus aztec abacus arithmetic abacus mathematics counting frames cranmer abacus bead frame abbacus russian abacus abacus calculation abacus abaci
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Abacus