Illiac Suite (later retitled String Quartet No. 4) is a 1957 composition for string quartet which is generally agreed to be the first score composed by an electronic computer. Lejaren Hiller, in collaboration with Leonard Isaacson, programmed the ILLIAC I computer at the University of Illinois at Urbana-Champaign (where both composers were professors) to generate compositional material for his String Quartet No. 4.