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jan 1, 1620 - Slide Rule

Description:

William Gunter developed a logarithmic rule for multiplication and division using dividers, which was the forerunner of the slide rule. Slide rules evolved to allow advanced trigonometry and logarithms, exponentials and square roots.

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The Calculator

ByMarshall
13 Sep 2017
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Date:

jan 1, 1620
Now
~ 406 years ago
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