Scientific, nautical, surveying, electric, photographic, cinematographic, optical, weighing, measuring, signalling, checking, teaching apparatus and instruments, namely, abacuses, teaching clocks, measuring sets comprising rulers and angle finders, and merit stamps; apparatus for recording, transmission or reproduction of sound or images, namely, computers, cameras, tablet computers, mobile phones, headphones and ear buds; blank magnetic data carriers and recording discs; cash registers, calc...