- Engineering services (4)
- Architectural services (2)
- Surveying services (2)
- Accounting, auditing, and bookkeeping (5)
- Commercial physical research (14)
- Commercial nonphysical research (1)
- Noncommercial research organizations (2)
- Testing laboratories (1)
- Management services (14)
- Management consulting services (13)
- Facilities support services (1)
- Business consulting, nec (13)
