 The popularity of this instant delivery system among musicians appears to be acting as a catalyst of new growth for the industry well into the foreseeable future.An early computer notation program available for home computers was Music Construction Set, developed in 1984 and released for several different platforms.Introducing concepts largely unknown to the home user of the time, it allowed manipulation of notes and symbols with a pointing device such as a mouse; the user would "grab" a note or symbol from a palette and "drop" it onto the staff in the correct location.