Allan McLeod Cormack, South-African-American physicist and academic, Nobel Prize laureate (d. 1998)

Allan MacLeod Cormack (February 23, 1924 – May 7, 1998) was a South African American physicist who won the 1979 Nobel Prize in Physiology or Medicine (along with Godfrey Hounsfield) for his work on X-ray computed tomography (CT).