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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| BQT Solutions (UK) Ltd | Access control | Global | |
| Fastlane Turnstiles | Gates and barriers | United Kingdom (UK) | |
| SMi Group Ltd. | Exhibition and conference organising | United Kingdom (UK) | |
| 3rd Eye Surveillance Systems | Digital video recording | United States of America (USA) | |
| 4A International, LLC | Consulting services | United States of America (USA) | |
| 50 State Security | Access control | United States of America (USA) | |
| AAA Security Service | Manned guarding | United States of America (USA) | |
| AAiD Security Solutions | Asset management | United States of America (USA) | |
| AB Connect Associates Ltd | Consulting services | United Kingdom (UK) | |
| Activator UK | IP networking products | United Kingdom (UK) | |
| Active Vision Inc. | CCTV | United States of America (USA) | |
| ADT | Integrated security | Global | |
| ADT Fire and Security Plc | CCTV | United Kingdom (UK) | |
| Advanced Biometrics Inc. | Biometrics | Global | |
| Advantage Security, Inc. | Physical security | United States of America (USA) | |
| Advantech, Inc. | Consulting services | United States of America (USA) | |
| Aella Consulting Group, Inc. | Consulting services | United States of America (USA) | |
| AFRISEC, LLC | Integrated security | Global | |
| AFTEK Ltd | Door interface/controls | India | |
| After Surveillance Security Distribution | Digital video recording | United States of America (USA) | |
| Aggleton & Associates | CCTV | United States of America (USA) | |
| Ajna Consulting Solutions | Consulting services | India | |
| Alderson Clark, Ltd | CCTV | United States of America (USA) | |
| ALGIZ Services Ltd | Consulting services | Germany | |
| All American Technology | CCTV | United States of America (USA) | |
| All Covert Security | IP networking products | United States of America (USA) | |
| Allen Security & Consultant Co., Inc. | CCTV | United States of America (USA) | |
| American Engineering Group (AEG) | Consulting services | United States of America (USA) | |
| Amerigard Alarm & Security Corp | Integrated security | North America | |
| Amplicon | IP networking products | United Kingdom (UK) | |



