10 44 00 Fire Protection Specialties 11 15 00 Security, Detention and Banking Equipment 11 16 00 Vault Equipment 11 17 00 Teller and Service Equipment 11 18 00 Security Equipment 13 27 53 Security Vaults 21 00 00 Fire Suppression 21 09 00 Instrumentation and Control for Fire-Suppression Systems 27 00 00 Communications 27 05 00 Common Work Results for Communications 27 20 00 Data Communications 27 24 00 Data Communications Peripheral Data Equipment 27 26 00 Data Communications Programming and Integration Services 27 30 00 Voice Communications 27 31 00 Voice Communications Switching and Routing Equipment 27 32 00 Voice Communications Terminal Equipment 27 33 00 Voice Communications Messaging 27 40 00 Audio-Video Communications