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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| Kawaden Co. Ltd. | CCTV | Japan | |
| K&G Spectrum Inc. | Perimeter protection | United States of America (USA) | |
| K-Pro Tech Co., Ltd. | Digital video recording | Korea (South) | |
| K50 Security | CCTV | United Kingdom (UK) | |
| K9 Matters Dog Training & Security | Training services | United Kingdom (UK) | |
| K9 Search Solutions Limited | Manned guarding | United Kingdom (UK) | |
| K9searchNdetect Limited | Explosives and chemical detection | United States of America (USA) | |
| Kaavach Intellectual Security Systems Pvt.Ltd. | Electronic article surveillance | India | |
| Kaba | Access control | Global | |
| Kaba Access and Data Systems - Americas | Access control | North America | |
| Kaba Classic | Access control | United Kingdom (UK) | |
| Kaba Jaya Security Sdn Bhd | Access control | Malaysia | |
| Kaba Management & Consulting AG | Access control | Global | |
| Kaba Security Pte Ltd. | Access control | Singapore | |
| Kabelsan Wire & Cable Industry Co. Ltd | Cables | Turkey | |
| KAC | Access control | United Kingdom (UK) | |
| Kaizen Infocomm Pvt Ltd | Biometrics | India | |
| Kalamazoo Secure Solutions Limited | Software | United Kingdom (UK) | |
| Kalamazoo-Reynolds | Asset management | United Kingdom (UK) | |
| Kalan Industrial Co., Ltd. | IP networking products | China | |
| KANAL SOLUTIONS LIMITED | Integrated security | India | |
| Kane Computing | CCTV | United Kingdom (UK) | |
| Kangrosa (Pty) Ltd | CCTV | South Africa | |
| Kantech, Tyco International | Access control | Global | |
| Kaolab | Software | France | |
| KAPLET, Inc | Consulting services | United States of America (USA) | |
| KapLogic Corporation | Integrated security | United States of America (USA) | |
| Kapsch BusinessCom AG | CCTV | Austria | |
| Kart-Sis Card Systems Corporation | Access control | Turkey | |
| Kastle Systems | CCTV | United States of America (USA) | |



