Recorded or live
One can distinguish between recorded and live broadcasts. The former allows correcting errors, and removing superfluous or undesired material, rearranging it, applying slow-motion and repetitions, and other techniques to enhance the program.
American radio network broadcasters habitually forbade prerecorded broadcasts in the 1930s and 1940s, requiring radio programs played for the Eastern and Central time zones to be repeated three hours later for the Pacific time zone. This restriction was dropped for special, as in the case of the German dirigible airship Hindenburg at Lakehurst, New Jersey, in 1937. During World War II prerecorded broadcasts from war correspondents were allowed on U.S. radio. In addition, American radio programs were recorded for playback by American Forces Radio stations around the world.
A disadvantage of recording first is that the public may know the outcome of an event from another source, which may be a spoiler. In addition, prerecording prevents live announcers from deviating from an officially-approved script, as occurred with propaganda broadcasts from Germany in the 1940s and with Radio Moscow in the 1980s.
An intermediate form is a delay of a few seconds, to suppress obscenity and technical failures.
- RUV  Iceland's Main Television and Radio broadcaster, owns RUV (Ríkísútvarpið) and RAS1 and RAS2 (National Radio, non-commercial)
- Stod2  Iceland's 2nd TV Service, more like the British ITV in that it is supported by advertising.
- RTÉ  Ireland's state broadcaster, responsible for the 2 biggest channels
- TV3  A commercial station, set up to provide some competition to RTÉ
- TG4  A state channel, independent from RTÉ, broadcasting mostly Irish-language programming
- Maori Television State-funded broadcaster in both Maori and English
- Radio New Zealand State-funded broadcaster (AM and FM) producing National Programme and Concert FM
Source | Copyright