Lejaren Hiller (1924–2019) was an American composer and a pioneering figure in the field of computer music. He is best known for his work in the genre of experimental and electronic music. Hiller gained prominence for his innovative use of computers in music composition, particularly through his collaboration with the University of Illinois at Urbana-Champaign's Computer-Based Music Research project. One of his most notable works is "Illiac Suite" (1957), which is considered one of the first pieces of music composed with the assistance of a computer. This string quartet work exemplifies Hiller's groundbreaking approach, blending traditional musical forms with algorithmic processes. His other significant contributions include "Music from Mathematics" (1967) and various works that explored the intersection of music and mathematics. Hiller's impact on music extends beyond his compositions; he was instrumental in advocating for the integration of technology in musical practices, influencing generations of composers and musicians. His efforts helped establish computer music as a legitimate form of artistic expression, paving the way for future innovations in the field.