Catalog of standards
Catalog of standards | Group code | Title |
| 33.020 | Telecommunications in general |
| 33.030 | Telecommunication services. Applications |
| 33.040 | Telecommunication systems |
| 33.050 | Telecommunication terminal equipment |
| 33.060 | Radiocommunications |
| 33.070 | Mobile services |
| 33.080 | Integrated Services Digital Network (ISDN) |
| 33.100 | Electromagnetic compatibility (EMC) |
| 33.120 | Components and accessories for telecommunications equipment |
| 33.140 | Special measuring equipment for use in telecommunications |
| 33.160 | Audio, video and audiovisual engineering |
| 33.170 | Television and radio broadcasting |
| 33.180 | Fibre optic communications |
| 33.200 | Telecontrol. Telemetering |