| Industry Group 871: Engineering, Architectural, And Surveying |
| · | 8711 Engineering Services |
| · | 8712 Architectural Services |
| · | 8713 Surveying Services |
| Industry Group 872: Accounting, Auditing, And Bookkeeping Services |
| · | 8721 Accounting, Auditing, and Bookkeeping Services |
| Industry Group 873: Research, Development, And Testing Services |
| · | 8731 Commercial Physical and Biological Research |
| · | 8732 Commercial Economic, Sociological, and Educational Research |
| · | 8733 Noncommercial Research Organizations |
| · | 8734 Testing Laboratories |
| Industry Group 874: Management And Public Relations Services |
| · | 8741 Management Services |
| · | 8742 Management Consulting Services |
| · | 8743 Public Relations Services |
| · | 8744 Facilities Support Management Services |
| · | 8748 Business Consulting Services, Not Elsewhere Classified |