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Leonard Maxwell Isaacson (December 15, 1925 – July 1, 2018) was an American chemist and composer.^[1]

Isaacson was born in Chicago, Illinois on December 15, 1925.^[2] He collaborated with Lejaren Hiller on the computer-programmed acoustic composition, Illiac Suite (1957).^[3][4] At the time, both composers were professors at the University of Illinois at Urbana–Champaign, and used the university's room-size ILLIAC I. He died in Belvedere Tiburon, California on July 1, 2018, at the age of 92.^[5]

• Hiller, Lejaren A., and Leonard M. Issacson. (1959/1979). Experimental Music: Composition With an Electronic Computer. McGraw-Hill, New York. ISBN 978-0-313-22158-3.