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, Nec1,318
366900Communications equipment, nec152
36690000Communications equipment, nec152
366901Emergency alarms540
36690100Emergency alarms237
36690101Burglar alarm apparatus, electric82
36690102Fire alarm apparatus, electric58
36690103Fire detection systems, electric37
36690104Metal detectors55
36690105Sirens, electric: vehicle, marine, industrial, and air raid35
36690106Smoke detectors36
366902Transportation signaling devices318
36690200Transportation signaling devices75
36690201Highway signals, electric7
36690202Marine horns, electric5
36690203Pedestrian traffic control equipment65
36690204Railroad signaling devices, electric30
36690205Signaling apparatus, electric41
36690206Traffic signals, electric95
366999Communications equipment, nec, nec308
36699901Intercommunication systems, electric217
36699902Visual communication systems91