The invention that altered history: The slide rule
In 1622, William Oughtred created the first slide rule, a simple and easy-to-use calculation device consisting of two parallel logarithmic rulers that can slide past each other.
Slide rule, Pickett model N902-T simplex trig(photo credit: ArnoldReinhold/CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/)/VIA WIKIMEDIA COMMONS)ByYUVAL ROSENBERG/DAVIDSON INSTITUTE, OFIR KUPERMAN/DAVIDSON INSTITUTEUpdated:
