
| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| Avigilon Corporation | CCTV | Canada | |
| 2M CCTV | CCTV | United States of America (USA) | |
| 3M Cogent | Biometrics | United States of America (USA) | |
| 3xLOGIC, Inc. | CCTV | Canada | |
| 911 Security Cameras | CCTV | United States of America (USA) | |
| AAA Security Service | Manned guarding | United States of America (USA) | |
| AATEL | CCTV | United States of America (USA) | |
| Aaxeon Technologies | Communication equipments | United States of America (USA) | |
| Aboundi Inc. | IP networking products | North America | |
| ABP Technology | CCTV | United States of America (USA) | |
| Accellion | Integrated security | United States of America (USA) | |
| Accent Alarms, Inc | CCTV | North America | |
| Access Control Servers | Access control | United States of America (USA) | |
| Access Security Corporation | CCTV | North America | |
| Access Technology Systems | Integrated security | United States of America (USA) | |
| Accu-Tech Corp. | Access control | United States of America (USA) | |
| Acme Security Systems | CCTV | United States of America (USA) | |
| Active Identity | RFID | United States of America (USA) | |
| Active Vision Inc. | CCTV | United States of America (USA) | |
| ActivIdentity, Inc. | Cards and readers | United States of America (USA) | |
| Acuity-vct | CCTV | United States of America (USA) | |
| Adesta LLC | CCTV | United States of America (USA) | |
| ADI Global Distribution | CCTV | North America | |
| ADT Security | CCTV | United States of America (USA) | |
| Advanced Automation Systems, Inc. | CCTV | United States of America (USA) | |
| Advanced Fire Systems Inc | Fire safety | United States of America (USA) | |
| Advanced Security Engineering Corporation | Threat and vulnerability assessment | United States of America (USA) | |
| Advanced Security Technologies | CCTV | United States of America (USA) | |
| Advent Systems Inc. | Digital video recording | United States of America (USA) | |
| Advent Systems, Inc. | Digital video recording | United States of America (USA) | |



