electronic security devices, namely control panels, security annunciators, fire, heat and motion detectors and monitors; communication devices, namely automatic telephone dialers, electronic signal and voice transmitters and receivers, cellular alarm transmitters; intrusion detection devices, namely intrusion alarms; electronic security systems comprising control panels and one or more fire, heat and motion detectors; central monitoring station devices, namely automatic telephone answering machines, alarm receivers for identifying callers and decoding alarm and monitoring signals and output devices, namely video display terminals and printers, and computer software for remote programming of alarm panels; fire detection systems and devices, namely fire and smoke alarms; access control systems and devices, namely access monitors and controls; and residential telephone systems and devices, namely telephones, telephone answering machines, telephone apparatus, namely intercoms, local telephone (PBX) exchanges, and telephone/security system interface units