Audio, video and audiovisual engineering
- 33/33.160/33.160.01 Audio, video and audiovisual systems in general
- 33/33.160/33.160.10 Amplifiers
- 33/33.160/33.160.20 Radio receivers
- 33/33.160/33.160.25 Television receivers
- 33/33.160/33.160.30 Audio systems
- 33/33.160/33.160.40 Video systems
- 33/33.160/33.160.50 Accessories
- 33/33.160/33.160.60 Multimedia systems and teleconferencing equipment
- 33/33.160/33.160.99 Other audio, video and audiovisual equipment