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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
electronic computer-based systems for regulating ignition and fuel injection of piston aircraft engines, namely, digital speed and fuel flow rate-control computers, manifold temperature sensors, cylinder head temperature sensors, exhaust gas temperature sensors, manifold pressure sensors, fuel pressure sensors, engine speed sensors, fuel injector solenoids, microprocessor circuit boards, electronic control units, throttle position switches, high voltage coils, electrical wiring, electrical connectors, fuel pump relays, engine data download ports, and interferences and monitors for displaying engine data collected by the computer-based systems