Sheet music is a modern musical symbols, it is handwritten or printed form of music notation. The medium of sheet music typically is paper although recently years it also includes presentation on computer screens. Use of the term "sheet" is intended to differentiate written music from an audio presentation, as in a sound recording, broadcast or live performance, which may involve video as well. In everyday use, "sheet music" can refer to the print publication of commercial music in conjunction with the release of a new film, record album, and other special or popular event which involves music.