| 61.1 | WIRED TELECOMMUNICATIONS ACTIVITIES |
| Class | The name of the class |
| 61.10 | Wired telecommunications activities |
| 61.2 | WIRELESS TELECOMMUNICATIONS ACTIVITIES |
| Class | The name of the class |
| 61.20 | Wireless telecommunications activities |
| 61.3 | SATELLITE TELECOMMUNICATIONS ACTIVITIES |
| Class | The name of the class |
| 61.30 | Satellite telecommunications activities |
| 61.9 | OTHER TELECOMMUNICATIONS ACTIVITIES |
| Class | The name of the class |
| 61.90 | Other telecommunications activities |