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The IPhone Of Slide Rules - Numberphile

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Thanks Audible: http://www.audible.com/numberphile
Alex Bellos discusses slide rules and then the Halden Calculex, which he describes as the "iPhone of Slide Rules"

Alex Bellos: http://www.alexbellos.com
Slide Rule Museum: http://sliderulemuseum.com
Purdue Libraries: https://www.lib.purdue.edu

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