Image of Oughtred's circular slide rule or mathematical ring. From The Circles of Proportion … invented by … Mr. William Oughtred (1632).
Image Source: www.maa.org

Image of Oughtred's circular slide rule or mathematical ring. From The Circles of Proportion … invented by … Mr. William Oughtred (1632).

Detail map of London, England, United Kingdom Overview map of London, England, United Kingdom

A: London, England, United Kingdom

William Oughtred Invents the Circular Form of Slide Rule

1632
Portrait of William Oughtred by Wenceslas Hollar
Image Source: en.wikipedia.org

Engraved portrait of William Oughtred by Wenceslas Hollar

English priest and mathematician William Oughtred invented the circular form of slide rule. He published Circles of Proportion and the Horizontal Instrument in London in 1632 describing slide rules and sundials.

Timeline Themes

Mathematics / Logic
Data Processing / Computing
Computer & Calculator Design / Architecture