North American Industry Classification System (NAICS) Canada 2017 Version 2.0
- 56 - Administrative and support, waste management and remediation services
- 561 - Administrative and support services
- 5616 - Investigation and security services
- 56161 - Investigation, guard and armoured car services
- 561611 - Investigation servicesUS
- 561612 - Security guard and patrol servicesUS
- 561613 - Armoured car servicesUS
- 56162 - Security systems services
- 561621 - Security systems services (except locksmiths)US
- 561622 - LocksmithsUS
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