| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 541690 | 541690 | 541690 | Agricultural consulting services | |||
| 541690 | 541690 | 541690 | Agrology consulting services | |||
| 541690 | 541690 | 541690 | Agronomy consulting services | |||
| 541690 | 541690 | 541690 | Biological consulting services | |||
| 541690 | 541690 | 541690 | Building envelope consulting services | |||
| 541690 | 541690 | 541690 | Chemical consulting services | |||
| 541690 | 541690 | 541690 | Dairy herd consulting services | |||
| 541690 | 541690 | 541690 | Economic consulting services | |||
| 541690 | 541690 | 541690 | Energy consulting services | |||
| 541690 | 541690 | 541690 | Entomology consulting services | |||
| 541690 | 541690 | 541690 | Geochemical consulting services | |||
| 541690 | 541690 | 541690 | Horticultural consulting services | |||
| 541690 | 541690 | 541690 | Hydrology consulting services | |||
| 541690 | 541690 | 541690 | Livestock breeding consulting services | |||
| 541690 | 541690 | 541690 | Motion picture consulting services | |||
| 541690 | 541690 | 541690 | Nuclear energy consulting services | |||
| 541690 | 541690 | 541690 | Physics consulting services | |||
| 541690 | 541690 | 541690 | Radio consulting services | |||
| 541690 | 541690 | 541690 | Roof consulting services | |||
| 541690 | 541690 | 541690 | Safety consulting services | |||
| 541690 | 541690 | 541690 | Security consulting services | |||
| 541690 | 541690 | 541690 | Waterproof consulting services |