Today is William Oughtred's Birthday!
was the inventor of the slide rule, a mechanical device employing sliding
logarithmic scales that was used for hundreds of years to speed up
arithmetical computations. The slide rule became obsolete in the 1970s,
due to the introduction of inexpensive electronic handheld calculators.
Born: March 5, 1574
in Eton, England
Died: June 30, 1660
in Albury, England