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A Cheenese abacus

The abacus (plural abaci or abacuses), an aa cried a coontin frame, is a calculatin tuil uised primarily in pairts o Asie for performin arithmetic processes. The day, abaci are eften constructit as a bamboo frame wi beads slidin on weirs, but oreeginally thay wur beans or stanes muived in gruives in saund or on taiblets o wid, stane, or metal. The abacus wis in uise centuries afore the adoption o the written modren numeral seestem an is still widely uised bi merchands, tredders an clarks in Asie, Africae, an ensewhaur. The uiser o an abacus is cried an abacist.