William Oughtred (1574-1660). Engraving by Wenceslaus Hollar.
|Died||30 June 1660 (aged 86)|
|Alma mater||King's College, Cambridge|
|Known for||Slide rule|
multiplication "×" sign
|Institutions||King's College, Cambridge|
|Notable students||John Wallis|
John Napier invented logarithms and Edmund Gunter created the logarithmic scales. Oughtred was the first to use two such scales. He slid one next to another to do direct multiplication and division. He is credited with inventing the slide rule in about 1622.