Industry: 3669—Communications Equipment, Not Elsewhere Classified
Establishments primarily engaged in manufacturing communications and related equipment, not elsewhere classified. Important products of this industry are intercommunication equipment, traffic signaling equipment, and fire and burglar alarm apparatus.

Burglar alarm apparatus, electricRailroad signaling devices, electric
Fire alarm apparatus, electricSignaling apparatus, electric
Fire detection systems, electricSignals: railway, highway, and traffic—electric
Highway signals, electricSirens, electric: vehicle, marine, industrial, and air raid
Intercommunications equipment, electronicSmoke detectors
Marine horns, electricTraffic signals, electric
Pedestrian traffic control equipment
Codes Titles Number of US Businesses
3669Communications Equipment, Nec1,345
366900Communications equipment, nec180
36690000Communications equipment, nec180
366901Emergency alarms539
36690100Emergency alarms230
36690101Burglar alarm apparatus, electric81
36690102Fire alarm apparatus, electric62
36690103Fire detection systems, electric38
36690104Metal detectors60
36690105Sirens, electric: vehicle, marine, industrial, and air raid33
36690106Smoke detectors35
366902Transportation signaling devices314
36690200Transportation signaling devices69
36690201Highway signals, electric6
36690202Marine horns, electric4
36690203Pedestrian traffic control equipment61
36690204Railroad signaling devices, electric36
36690205Signaling apparatus, electric39
36690206Traffic signals, electric99
366999Communications equipment, nec, nec312
36699901Intercommunication systems, electric218
36699902Visual communication systems94