DiscoDOS helps a DJ remember and analyze what they played in their sets, or what they could possibly play in the future. It's based on data pulled from a users Discogs record collection. Tracks can be organized into playlists and mix-transitions rated. Additionally the collection can be linked to MusicBrainz and AcousticBrainz, thus further information (like musical key and BPM) is made available to the user.