North American Product Classification System (NAPCS) Canada [Provisional Version 0.1]
- 561 - Administrative and support services
- 561023 - Business support services
- 561023.6 - Call centre services
- 561023.6.1 - Call centre telemarketing services
- 561023.6.1.1 - Call centre outbound telemarketing services
- 561023.6.1.2 - Call centre inbound telemarketing services
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