| 71.1 | ARCHITECTURAL AND ENGINEERING ACTIVITIES AND RELATED TECHNICAL CONSULTANCY |
| Class | The name of the class |
| 71.11 | Architectural activities |
| 71.12 | Engineering activities and related technical consultancy |
| 71.2 | TECHNICAL TESTING AND ANALYSIS |
| Class | The name of the class |
| 71.20 | Technical testing and analysis |