In 1967, when the electronic composer Morton Subotnick released Silver Apples of the Moon, he seemed to be exploring a limitless world. Four decades later, his pioneering compositions: Two LIfe Histories, The Key to Songs, Jacob's Room, Media Poem, and Gestures: It starts with Colors, are still appealing. Morton Subotnick is one of the pioneers in the development of electronic music and an innovator in works involving instruments and other media, including interactive computer music systems. Since 1967, his œuvre utilizes many of the important technological breakthroughs in the history of the genre.