ABACUS CONSULTING LLC
the free encyclopedia Calculating tool "Abaci" redirects here. For the Turkish surname · see Abacı . For the medieval book · see Liber Abaci . For other uses · see Abacus (disambiguation) . Bi-quinary coded decimal -like abacus representing 1 · 352 · 964 · 708 An abacus ( pl. abaci or abacuses ) · 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 electronic calculators · during the 1980s · with some ongoing attempts to revive their use. [ · 1 ] · [ · 2 ] · 3 ]
WASHINGTON, DC 20002
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307 S ST NE #8
WASHINGTON, DC 20002
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