| H | Sektion H — Elektrotechnik | ELECTRICITY | |
 | H04 | Elektrische Nachrichtentechnik | ELECTRIC COMMUNICATION TECHNIQUE |
 | H04H | Rundfunkübertragung (Multiplexverkehr H04J; Bildübertragung in Rundfunksystemen H04N) | BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N) |