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
bead frame abacus mathematics abacuses abbacus russian abacus cranmer abacus abaci abacus aztec counting frames abacist abacists reckoning frame nepohualtzintzin abacus arithmetic counting frame abacus abacus calculation
abacus
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Abacus