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A comprehensive technical exploration of slide rules, covering their mathematical foundations in logarithms, operational principles, and historical significance. Details the mechanics of different slide rule types (straight, circular, cylindrical), explains how logarithmic scales enable multiplication and division through addition and subtraction, and demonstrates procedures for arithmetic, trigonometric, and exponential calculations. Includes practical guidance on using, maintaining, and collecting these analog computing devices that powered engineering from the 17th century through the 1970s.

How Slide Rules Work · Amen Zwa, Esq.