Music Construction Set

Will Harvey's Music Construction Set (MCS) is a music composition notation program designed by Will Harvey for the Apple II and published by Electronic Arts in 1984. Harvey wrote the original Apple II version in assembly language when he was 15 and in high school. MCS was conceived as a tool to add music to his first and only published software, an abstract shooter called Lancaster for the Apple II.

Music Construction Set was ported to the Atari 8-bit family, Commodore 64, IBM PC (as a booter), and the Atari ST. A redesigned version for the Amiga and Macintosh was released in 1986 as Deluxe Music Construction Set.