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; compact discs, dvds and other digital recording media; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment, computers; computer software; fire-extinguishing apparatus; matrix switches; crossbar switches; switches, in particular remote switches; changeover switches; extenders, in particular vga extenders and usb extenders; devices for converting signals; devices for increasing the distance during signal transmission, in particular repeaters; operating and control consoles electrical; holders for electrical and electronic devices and cables, in particular mounting plates; power supply units; transformers; amplifiers for signals, in particular electrical and electronic amplifiers for video, audio and data signals; usb cables; usb dongles wireless network adapters; bus interfaces; signal cables for it, audiovision and telecommunications, in particular optical and electrical fiber cables; cable ducts; computer peripheral devices; electronic displays; display panels; interference suppression devices electricity; remote controls; terminals electricity; contacts electrical; acoustic couplers; couplers data processing equipment; loudspeakers; luminous signs; measuring apparatus; relays electrical; electrical fuses; signalling apparatus; transmitters for electronic signals; voltage boosters; sound measuring devices