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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.
rack structural systems comprised of mounting boards for bearing rails in a 19 inch grid layout and in a metric grid layout, fasteners, appliance bases, telescopic rails, splicing boxes, metal plates for accommodating metal electrical plugs and couplings, metal plates having clips for routing cables, slide rails and metal housings for accommodating power supplies and other electrical components, namely socket strips, contact strips, and structural carriers for electrical component assemblies