Neon lamps are used both to produce light as indicators and for special-purpose illumination, and also as circuit elements displaying negative resistance.
Designing special-purpose rooms has more exotic challenges, since these rooms may have requirements for unusual features such as concert performance, sound studio recording, lecture halls.
Often, these structures incorporate sophisticated features such as ventilation, temperature regulation, structural strength, multiple escape routes, traps, bait, special-purpose chambers and many other features.
These departments are generally organized as local or county government subsidiaries, special-purpose district entities or not-for-profit corporations.
An electronic drum module is a special-purpose electronic device which accepts input from the drummer via external triggers that are hit with regular drum sticks.