One who calculates; a person skilled in making calculations or computations; an alternative spelling of calculator.
From Latin calculer or calcularis, meaning 'one who counts with pebbles.' This is an archaic or alternative form of calculator, less commonly used in modern English.
Before electronic calculators existed, 'calculers' were people hired specifically to do mathematical computations—there were entire rooms of them! Women were often preferred for these jobs because employers believed they were more accurate and paid them less.
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