William Oughtred
Slide rule
English mathematician William Oughtred developed the slide rule. This machine could perform operations like addition, subtraction, multiplication, and division. It was widely used in Europe in 16th century. Slide rule an improvement over the logarithm tables as the final value could be straight away read on the scale.
Search Terms : slide rule, a slide rule, slide ruler, sliderule, log, log tables, logarithm table
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