Compositions   1951: Concerto for Prepared Piano 1952: 4' 33" 1958: Piano Concerto 1960: Cartridge Music 1969: HPSCHD 1972: Bird Cage 1981: Thirty Pieces for Five Orchestras	Science 1930: Carrother/Du Pont: Nylon   1953: Crick & Watson: Helical DNA     1969: Armstrong: Walks on Moon