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, Nec1,311
366900Communications equipment, nec168
36690000Communications equipment, nec168
366901Emergency alarms532
36690100Emergency alarms230
36690101Burglar alarm apparatus, electric78
36690102Fire alarm apparatus, electric61
36690103Fire detection systems, electric37
36690104Metal detectors55
36690105Sirens, electric: vehicle, marine, industrial, and air raid34
36690106Smoke detectors37
366902Transportation signaling devices310
36690200Transportation signaling devices74
36690201Highway signals, electric7
36690202Marine horns, electric4
36690203Pedestrian traffic control equipment60
36690204Railroad signaling devices, electric32
36690205Signaling apparatus, electric39
36690206Traffic signals, electric94
366999Communications equipment, nec, nec301
36699901Intercommunication systems, electric214
36699902Visual communication systems87