Teletext systems network in the mid-late 1970s. Due to the adoption of a common teletext standard (WST), the ORACLE system ceased in 1976. The name was retained for the service itself, that continued after that year using the WST standard. "World System Teletext" (or "WST") is the name of a standard for teletext throughout Europe today. Almost all television sets sold in Europe since the early ’80s have built-in WST-standard teletext decoders as a feature. It originally stems from the UK standards developed by the BBC (Ceefax) and the UK Independent Broadcasting Authority (ORACLE) in 1974 for teletext transmission, extended in 1976
BBC World Service 05:20am on BBC Radio 4 FM & DAB. It has always been in mono on its own DAB channel with a bit rate of just 64 kbit/s. BBC World Service can also be heard on BBC Radio Wales from 01:00am until 05:30am on MW and FM stereo. In the 1990s, the BBC purchased and constructed large medium wave and FM networks in the former Soviet bloc, particularly the Czech (BBC Czech Section), Slovak Republics (BBC Slovak Section), Poland (BBC Polish Section) (where it was a national network) and Russia (BBC Russian Service). It had built up a strong audience during