- An overall control fader or lever on a lighting or sound control board. The Grand Master takes precedence over all controls and allows the operator to fade out the entire output of the lighting desk. On a lighting desk, the Preset Master allows the control of a section of the desk independently from the rest. See also Submaster.
- An original (i.e. Master Tape, Master Plan) which should be used only to make a copy from which to work.
- A Department Head (i.e. Master Carpenter, Master Electrician)