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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| VideoIQ | Digital video recording | North America | ![]() |
| AD Aerospace Ltd | CCTV | United Kingdom (UK) | |
| Fastlane Turnstiles | Gates and barriers | United Kingdom (UK) | |
| Moxa Europe GmbH | IP networking products | Western Europe | |
| On-Net Surveillance Systems, Inc. | Software | Global | |
| Telexper International Inc. | CCTV | Global | |
| 3VR Security Inc. | Searchable Surveillance | United States of America (USA) | |
| 4D Security Solutions, Inc. | Integrated security | United States of America (USA) | |
| AATEL | CCTV | United States of America (USA) | |
| Access Systems Integration, LLC | Integrated security | United States of America (USA) | |
| AccessData Group, LLC. | IP networking products | United States of America (USA) | |
| Accu-Tech Corp. | Access control | United States of America (USA) | |
| Acme Security Systems | CCTV | United States of America (USA) | |
| ACMP | CCTV | Global | |
| ACTAtek Pte. Ltd. | Access control | Singapore | |
| Active Response Monitoring | Central monitoring systems | United States of America (USA) | |
| Active Vision Inc. | CCTV | United States of America (USA) | |
| Adesta LLC | CCTV | United States of America (USA) | |
| ADS Security | Central monitoring systems | United States of America (USA) | |
| ADT | Integrated security | Global | |
| Advanced Digital Security, Inc | CCTV | United States of America (USA) | |
| Advancis Software | Software | United States of America (USA) | |
| Advantech, Inc. | Consulting services | United States of America (USA) | |
| Advantor System Corporation | Access control | United States of America (USA) | |
| AFRISEC, LLC | Integrated security | Global | |
| AFTEK Ltd | Door interface/controls | India | |
| Aiphone Corp. | Intercom systems | United States of America (USA) | |
| All American Technology | CCTV | United States of America (USA) | |
| All Covert Security | IP networking products | United States of America (USA) | |
| All-Star Identification Systems, Inc. | Software | United States of America (USA) | |



