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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| UBM India Pvt. Ltd | Media | India | |
| U.S. General Services Administration | Consulting services | United States of America (USA) | |
| U.S. Lock Corporation | Access control | United States of America (USA) | |
| U.S. Security Associates, Inc. | Physical security | United States of America (USA) | |
| U.S. Security Consultants | Physical security | United States of America (USA) | |
| U.S. Security Consultants (Saber Security) | Physical security | United States of America (USA) | |
| Ubercros Seguridad S.L. | Integrated security | Spain | |
| UBIFRANCE | CCTV | France | |
| Ubiquiti Networks | Software | United States of America (USA) | |
| UBIQZ Ltd. | IP networking products | United Kingdom (UK) | |
| UBM Live | Access control | United Kingdom (UK) | |
| uControl, Inc. | Control equipments | United States of America (USA) | |
| UDP Co., Ltd. | Digital video recording | Global | |
| UHL Company | Intrusion detection | United States of America (USA) | |
| UK Doorsets Ltd. | Door interface/controls | United Kingdom (UK) | |
| UK Fire International Ltd | Fire safety | United Kingdom (UK) | |
| UK Security Projects (UKSP) Ltd. | IP networking products | United Kingdom (UK) | |
| UK Watch Ltd | CCTV | United Kingdom (UK) | |
| UK Watch Ltd | CCTV | United Kingdom (UK) | |
| UKB International | Biometrics | United Kingdom (UK) | |
| UKeHUB Ltd | CCTV | United Kingdom (UK) | |
| Ukrainian Newest Telecommunications (UNTC) | IP networking products | Ukraine | |
| UKTI Defence & Security Organisation | Physical security | United Kingdom (UK) | |
| ULIRvision Technology Co., LTD | Thermal security camera | China | |
| ULIS | Integrated security | Western Europe | |
| Ultimate Protection Systems Ltd | CCTV | United Kingdom (UK) | |
| Ultimate Security Services Limited | Manned guarding | United Kingdom (UK) | |
| Ultra ELECTRONICS - USSI | Fire safety | United States of America (USA) | |
| Ultra Electronics Card Systems | Access control | United Kingdom (UK) | |
| Ultra Electronics Card Systems Inc. | Access control | Global | |


