noun
EXAMPLES FROM CORPUS
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All of them will make either a slide rule or an abacus as a way of presenting how number sets work.
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Greatly skilled at plotting the heavens and working things out on the old slide rule .
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The slide rule , the calculating machine, and the computer are the enemies of the arithmetic mind.
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There were several colors of pencils, even a slide rule , at which she was frowning.
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They are not activities which can be accomplished with a slide rule or computer or calculator.