| 72.1 | RESEARCH AND EXPERIMENTAL DEVELOPMENT ON NATURAL SCIENCES AND ENGINEERING |
| Class | The name of the class |
| 72.11 | Research and experimental development on biotechnology |
| 72.19 | Other research and experimental development on natural sciences and engineering |
| 72.2 | RESEARCH AND EXPERIMENTAL DEVELOPMENT ON SOCIAL SCIENCES AND HUMANITIES |
| Class | The name of the class |
| 72.20 | Research and experimental development on social sciences and humanities |