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In music, the term note has two primary meanings: A sign used in musical notation to represent the relative duration and pitch of a sound (♪, ♫); A pitched sound itself. http://musicnotes.pp.ua/

Sheet music is a handwritten or printed form of music notation that uses modern musical symbols. Like its analogs – books, pamphlets, etc. – the medium of sheet music typically is paper (or, in earlier times, parchment), although the access to musical notation in recent years also includes presentation on computer screens. http://musicnotes.pp.ua/

Essays are generally scholarly pieces of writing giving the author's own argument, but the definition is vague, overlapping with those of an article, a pamphlet and a short story. http://essay.pp.ua/