Today in
Computer History

Saturday, August 28, 1655
William Oughtred wrote a letter to John Evelyn
While John Evelyn was a well-known English writer, it's William Oughtred with the computer-related history. After John Napier invented logarithms , and Edmund Gunter created the logarithmic scales upon which slide rules are based, it was Oughtred who combined these to be credited as the inventor of the slide rule.