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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.
educational microcomputer applications instructional workstation for teaching principles of computer control, comprising a microcomputer applications trainer system namely, built-in computer hardware sub-systems, analog and digital electronic circuit components, function generator, a solderless socket breadboarding area in which various electronic circuit components are inserted and interconnected with the built-in electronic circuit components in the specific circuit configuration being studied, computer bus interface, personal computer buffer card, computer programs, associated instruction and user manuals sold therewith; a keyboard and display module, namely, built-in segmented display devices, programmable counter and timer, programmable input and output data address control, digital logic pulsers, digital switches, digital indicators, computer programs, associated instruction and user manuals sold therewith; a sensor module, namely, built-in temperature sensor, magnetic sensor, optical sensor, moisture sensor, power supply, multiple channel multiplexer, computer programs, associated instruction and user manuals sold therewith; a dc stepper motor module, namely, stepping motor, electronic circuitry for powering stepping motor, computer programs, associated instruction and user manuals sold therewith; a dc servomotor module, namely, servomotor, electronic amplification circuitry, computer programs, associated instruction and user manuals sold therewith