- Engineering services (30)
- Architectural services (5)
- Surveying services (3)
- Accounting, auditing, and bookkeeping (54)
- Commercial physical research (3)
- Commercial nonphysical research (4)
- Noncommercial research organizations (4)
- Testing laboratories (4)
- Management services (26)
- Management consulting services (56)
- Public relations services (6)
- Business consulting, nec (59)
