ACCESS CONTROL AND ALARM MONITORING SYSTEMS; ANTENNAS; AUDIO AMPLIFIERS; AUDIO SPEAKER ENCLOSURES; AUDIO SPEAKERS; AUTOMATIC TELEPHONE DIALERS; CABLE CONNECTORS; CABLE MODEMS; CABLE TELEVISION CONVERTERS; CELLULAR TELEPHONES; COMMUNICATION HUBS; COMMUNICATION SERVERS; COMPUTER CABLES; COMPUTER CURSOR CONTROL DEVICES, NAMELY, COMPUTER MOUSE, DIGITIZER TABLETS, LIGHT PENS, TOUCH PADS AND TRACKBALLS; COMPUTER GRAPHICS SOFTWARE; COMPUTER HARDWARE; COMPUTER NETWORK ADAPTERS; COMPUTER NETWORK HUBS,...