You searched for: “abacist
abacist (s) (noun), abacists (pl)
A person who is skilled in using an ancient form of a calculator consisting of counters that are moved in a groove or on a wire to represent a variety of numbers: In school during her math lesson Susan learned that math was often done in earlier times on an abacus by abacists who often used them at the market for calculating the costs of their wares.
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