- 541211 – Offices of Certified Accountants
- 541330 – Engineering Services
- 541511 – Custom Computer Programming Services
- 541512 – Computer Systems Design Services
- 541513 – Computer Facilities Management Services
- 541519 – Other Computer Related Services
- 541611 – Administrative Management and General Management Consulting
- 541618 – Other Management Consulting Services
- 541690 – Other Scientific and Technical Consulting Services
- 541711 – Research and Development in Biotechnology
- 541712 – Research and Development in the Physical, Engineering, and Life Sciences
- 541990 – All Other Professional, Scientific, and Technical Services
- 561210 – Facilities Support Services
- 621111 – Offices of Physicians (except Mental Health Specialists
- 621112 – Offices of Physicians, Mental Health Specialists
- 621399 – Offices of All Other Misc Health Practitioners