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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 security systems-namely, electronic detection apparatuses, electronic sirens, contacts, control equipment comprising entry delay timers, exit delay timers, alarm reset timers, alarm latchesand satellite alarm controls, power supplies, comprising a.c./d.c. converters and voltage and current regulators, telephone dialing instruments, central station instruments, access control instruments comprising coded keyboards or cards for unlocking doors, de-energising alarm systems and operating elevators or other devices and parts thereof for all the above