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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| Adax Business Systems W.L.L. | CCTV | Qatar | |
| Superior Electronics Corporation | CCTV | Taiwan | |
| Warrior Security Ltd. | Manned guarding | Africa | |
| 247 Group | Biometrics | South Africa | |
| 4Site Online Ltd. | Integrated security | Western Europe | |
| A.G.P - Advanced German Products-LLC | Security entrances | United Arab Emirates | |
| AAC Mechanical & Electrical | CCTV | United Kingdom (UK) | |
| Aarya Ites Pvt. Ltd. | CCTV | India | |
| AB Security | CCTV | United Kingdom (UK) | |
| ABL, Inc. | Physical security | Czech Republic | |
| Able Security Concepts Ltd | Manned guarding | United Kingdom (UK) | |
| ABM Data Systems | Software | United States of America (USA) | |
| Absolute Security Ltd. | CCTV | Kenya | |
| Accent Alarms, Inc | CCTV | North America | |
| Access Buzzers | Door interface/controls | United Kingdom (UK) | |
| Access Control SA | Access control | South Africa | |
| Access Key and Lock | Access control | United Kingdom (UK) | |
| Acme Security Systems | CCTV | United States of America (USA) | |
| Acropolis Electronic Security Systems. | Integrated security | India | |
| Adaar Technology | Integrated security | India | |
| ADB Alarms Ltd | Intruder alarm | United Kingdom (UK) | |
| ADEN Services | Physical security | China | |
| ADi security and surveillance | CCTV | United Kingdom (UK) | |
| ADL Fire and Security Ltd | CCTV | United Kingdom (UK) | |
| ADS Security | Central monitoring systems | United States of America (USA) | |
| ADV Security | Intruder alarm | United Kingdom (UK) | |
| Advance Monitoring Solutions Limited | CCTV | United Kingdom (UK) | |
| Advance Peripheral Systems Ltd | Intruder alarm | United Kingdom (UK) | |
| Advanced Alarm Technologies | Intruder alarm | United States of America (USA) | |
| Advanced Security Developments | CCTV | United Kingdom (UK) | |



