computer terminals; computer hardware; computers; downloadable computer programs and downloadable computer software for data processing; optical data media; computer programs for monitoring computer performance; computer cases; central processing units; computer peripheral devices; computer hardware for monitoring computer performance; cabinet specially for computers; computer software, recorded; computer network servers; data processing apparatus; mounting brackets adapted for computer; computer memory devices; integrated circuit cards; quantity indicators; switchboards; network communication equipment; optical communication instrument; radios; computer network switches; monitoring apparatus, other than for medical purposes; gauges; optical apparatus and instruments; optical cables; materials for electricity mains, namely, wires and cables; plug connector; electric switches; integrated circuits; touch screens; transducer; video screens; electrical connector receptacle; electrical plugs, sockets and other contacts; alarms; electrical batteries