| 541330 | Engineering Services (Primary) |
| 492110 | Couriers & Express Delivery Services |
| 492210 | Local Messengers & Local Delivery |
| 511210 | Software Publishers |
| 518210 | Data Processing, Hosting, & Related Services |
| 519120 | Libraries & Archives |
| 519130 | Internet Publishing & Broadcasting & Web Search Portals |
| 519190 | All Other Information Services |
| 524114 | Direct Health & Medical Insurance Carriers |
| 541511 | Custom Computer Programming Services |
| 541512 | Computer Systems Design Services |
| 541513 | Computer Facilities Management Services |
| 541519 | Other Computer Related Services |
| 541611 | Administrative Management & General Management Consulting Services |
| 541612 | Human Resources Consulting Services |
| 541613 | Marketing Consulting Services |
| 541614 | Process, Physical Distribution, & Logistics Consulting Services |
| 541618 | Other Management Consulting Services |
| 541990 | All Other Professional, Scientific, & Technical Services |
| 561210 | Facilities Support Services |
| 561410 | Document Preparation Services |
| 561421 | Telephone Answering Services |
| 561431 | Private Mail Centers |
| 561621 | Security Systems Services (except Locksmiths) |
