Original SoundTrack, ie the music of an anime or video game, including all the songs.

Original Sound Track; the background music of an anime production, including all songs.

Music from an anime released on CD (Original Soundtrack). taku A fan of Anime/Manga in the U.S. In Japan, otaku is a geek.

Not strictly a warez term this one, but one that you are likely to come across while searching for MP3 music. It stands for original soundtrack (movie music).

original soundtrack. A collection of music found in a particular video game, anime, movie, TV series, etc. Often referred to as a "music score" or simply a "soundtrack" in the U.S. For some reason, Japanese companies love adding on the word "original." In katakana, it is spelled "ORIJINARU SAUNDOTORAKKU." However, many Japanese will truncate that second word to "SAUNDOTORA."

see original soundtrack

original soundtrack (i.e. music taken directly from the soundtrack to a game or animé, rather than "inspired by").