Low voltage power supply; electrical bus duct; electric plugs; couplings, electric; electrical cable connection fittings in the nature of electrical cables for use in connections, ducting for electric cables; electricity, acoustic conduits; connections for electric lines; junction sleeves for electric cables; electrical connectors in the nature of plugs, sockets and electric contacts; computer peripheral equipment; network communication equipment, namely, network routers, computer network bridges, computer network interface devices, computer networking hardware; electrical connections in the nature of sockets, plugs and electrical connectors; mechanical devices used for computer operating instrument, namely, computer memory devices, input devices for computers, computer network interface devices, computer hardware and computer peripheral devices; electric theft prevention installations, namely, theft alarms, sound alarms, alarm monitoring systems, electronic door alarms, security alarm controllers; wires, electric; cables, electric