Jack St. Clair Kilby (November 8, 1923 – June 20, 2005) was an American electronics engineer who took part, along with Robert Noyce of Fairchild Semiconductor, in the realization of the first integrated circuit while working at Texas Instruments in 1958. For this invention, Kilby shared the 2000 Nobel Prize in Physics.
Kilby was also a co-inventor of the handheld calculator and the thermal printer, for which he had the patents. He also had patents for seven other inventions.