9 Scientific, surveying, photographic, optical, measuring, signaling, checking and supervision, life-saving and teaching apparatus and instruments, namely, computers, computer hardware, cameras, surveying instruments, cinematographic machines and apparatus, optical inspection apparatus, weighing machines, instruments for measuring length, signal processors; apparatus and instruments for switching, transforming, accumulating, regulating and controlling electricity; apparatus for recording, transmission or reproduction of sound and images; calculating machines, data processing equipment, computers