| 20/00 | Arrangements for broadcast or for distribution combined with broadcast |
| 20/02 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for relaying broadcast information |
| 20/04 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for relaying broadcast information from field pickup units [FPU] |
| 20/06 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for relaying broadcast information among broadcast stations |
| 20/08 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for relaying broadcast information among terminal devices |
| 20/10 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for replacing or switching information during the broadcast or during the distribution |
| 20/12 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for monitoring, testing or troubleshooting |
| 20/14 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for monitoring, testing or troubleshooting for monitoring programmes |
| 20/16 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for broadcast or distribution of identical information repeatedly |
| 20/18 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for synchronising broadcast or distribution via plural systems |
| 20/20 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for broadcast or distribution of identical information via plural systems |
| 20/22 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for broadcast or distribution of identical information via plural systems Arrangements for broadcast of identical information via plural broadcast systems |
| 20/24 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for broadcast or distribution of identical information via plural systems Arrangements for distribution of identical information via broadcast system and non-broadcast system |
| 20/26 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for switching distribution systems |
| 20/28 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information |
| 20/30 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information by a single channel |
| 20/31 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal |
| 20/33 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information by plural channels |
| 20/34 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information by plural channels using an out-of-band subcarrier signal |
| 20/36 | Arrangements for broadcast or for distribution combined with broadcast Arrangements for simultaneous broadcast of plural pieces of information for AM broadcasts |