The first movie soundtrack released for sales was for the 1946 film "Till the Clouds Roll By."
Movie soundtracks are the only way for fans of original film scores to have a recording of the music.
Original score soundtracks will include every score in the film while motion picture soundtracks generally include music inspired by the film and not necessarily music in the film.
Original score soundtracks go out of print soon after the film is released. Because of this, many scores become collector's items.
"The Bodyguard" soundtrack is the biggest selling film soundtrack of all time, selling over 37 million copies.