monitoring and surveillance apparatus, and apparatus for recording, storing, processing, displaying, transmitting, and reproducing data, messages, images, and sounds, and in particular computers and parts therefor; unmanned satellites and space probes and on-board equipment therefor, and in particular radio and television transmitters adn receivers, radio antennas, solar (battery) panels using the photoelectric or the photovoltaic effect; equipment and installations for stations for monitorin...