A columnar, chronological breakdown of the events happening during the course of a piece of music or film. Typically a cue sheet generally has three columns: the address (usually in SMPTE Time Code) of the event, the Real/Clock Time of the occurrence of the event (as accumulated from the start of the music for the cue, counting from time 0:00.00) then a terse description of the event at that time and address. It is not uncommon to also have columns for the cue number (1, 2, 3, etc.) and the cue length. Cue lists are used in many facets of audio production including MIDI sequencers, mixing automation systems, film scoring, and digital audio editing.