submaster

A key that can open several locks, but fewer than a master key.

In an office, a submaster might open all doors in the accounting department; in an industrial facility, it might open all locks in the loading dock area.

Do not point specifically at the executives but find out what the cost estimates are for rekeying a submaster space or the entire facility when one of these keys gets lost […]

A copy of a master copy of a recording, generally kept for archival purposes.

Unlike cue or group information, submasters usually actively exist and don't need to be created. Methods for recording channel information into different submasters may vary between consoles.

In Edward's absence, Sonny Boy learned to press the discs at Chariot Records. He mastered a process of producing gold-molded submasters that could be played on the phonographs people were now buying for their homes.

A secondary or subsidiary schoolmaster.

Masters […] Submasters […] Teacher of French […] Teacher of drawing