Slide rule

Updated: 04/26/2017 by Computer Hope
A typical slide rule.

A slide rule, also known as a slide ruler or a slipstick, is an extremely complex ruler that functions as an analog computer. By sliding various components of the ruler to align with each other, a slide rule can compute products, roots, logarithms, and the result of trigonometric functions.

In the mid-1600s, the linear slide rule was invented by Reverend William Oughtred and the inner slide rule was invented by Robert Bissaker. Until the invention of the pocket calculator in the 1960s, the slide rule was used by virtually every scientist and mathematician in the world.

Measurements, Ruler, Slide