North American Industry Classification System (NAICS) Codes
| 541213 | Tax Preparation Services | ||
| 541214 | Payroll Services | ||
| 541219 | Other Accounting Services | ||
| 541330 | Engineering Services’ | ||
| 541511 | Customer Computer Programming Services | ||
| 541513 | Computer Facilities Management Services | ||
| 541519 | Other Computer Related Services | ||
| 541611 | Administrative Management and General Management Consulting | ||
| 541612 | Human Resources Consulting Services | ||
| 541618 | Other Management Consulting Services | ||
| 541690 | Other Scientific and Technical Consulting Services | ||
| 561110 | Office Administrative Services | ||
| 561210 | Facilities Support Services | ||