36690 - Communications equipment (Miscellaneous)
36691 - Alarm systems
3669148 - - Intrusion detection alarm systems, Local
3669149 - - Intrusion detection alarm systems, Central station
3669150 - - Intrusion detection alarm systems, Direct connect
3669151 - - Intrusion detection holdup alarm systems (Commercial & Industrial)
3669152 - - Intrusion detection alarm systems, Automotive
3669153 - - Smoke & Heat detection alarms, Ionization chamber type
3669154 - - Smoke & Heat detection alarms, other Types, incl Photocell type
3669156 - - Fire detection & Prevention alarm systems, Central station
3669157 - - Fire detection & Prevention alarm systems, Direct connect
3669159 - - Other Intercommunication & Alarm systems, incl Electric sirens, Horns & Security locking systems
3669185 - - Other Electronic teaching machines & Teaching aids
36692 - Traffic control equipment
3669242 - - Signal heads, Parts & Accessories for Vehicular & Pedestrian traffic control equipment
3669243 - - Electronic & Electromechanical vehicular & Pedestrian traffic controllers, Detectors & Sensors
3669245 - - Vehicular & Pedestrian traffic railway highway grade crossing signals (excl relays & other Control apparatus)
3669246 - - Other Vehicular & Pedestrian traffic railway signal systems & Safety control equipment
36693 - Intercommunication equipment
3669312 - - Intercommunications systems, incl Inductive paging systems, Wired
3669313 - - Intercommunications systems, incl Inductive paging systems, Nonwired
3669314 - - Intercommunications systems, incl Inductive paging systems (Selective calling): AM/FM home radio intercom systems
3669XX0 - - Communictions equipment (Miscellaneous)
3669XX2 - - Communications equipment (Miscellaneous : Speciality )