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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 wireless sensors, namely, temperature probes and sensors, light sensors, motion detectors, ph sensors, force sensors, sound probes, electricity flow and measurement sensors, magnetometers, and oxygen and dissolved oxygen sensors, for use in science, mathematics and engineering instruction of elementary, junior high, high school, and college age students