- Engineering services (44)
- Architectural services (41)
- Surveying services (2)
- Accounting, auditing, and bookkeeping (47)
- Commercial physical research (9)
- Commercial nonphysical research (13)
- Noncommercial research organizations (3)
- Testing laboratories (2)
- Management services (40)
- Management consulting services (209)
- Public relations services (9)
- Facilities support services (1)
- Business consulting, nec (132)