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, nec181
36690000Communications equipment, nec181
366901Emergency alarms534
36690100Emergency alarms230
36690101Burglar alarm apparatus, electric81
36690102Fire alarm apparatus, electric63
36690103Fire detection systems, electric37
36690104Metal detectors56
36690105Sirens, electric: vehicle, marine, industrial, and air raid30
36690106Smoke detectors37
366902Transportation signaling devices313
36690200Transportation signaling devices67
36690201Highway signals, electric6
36690202Marine horns, electric3
36690203Pedestrian traffic control equipment60
36690204Railroad signaling devices, electric34
36690205Signaling apparatus, electric38
36690206Traffic signals, electric105
366999Communications equipment, nec, nec317
36699901Intercommunication systems, electric223
36699902Visual communication systems94