Sunday, August 18, 2013

Slide rule, the computer before computers

Some people forget that not computers put a man on the moon. Before the era of lightning fast calculations made with the aid of computers engineers used slide rulers.



slide rule



I have 2 slide rule, one for engineering that can make conversion between units, an a general purpose one.

General purpose slide rule - 1972

slide ruller unit conversion
Units conversion slide rule

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