Teletext a plug in circuit board. It took another decade before the decoders became a standard feature on almost all sets with a screen size above 15 inches (teletext is still usually only an option for smaller "portable" sets). From the mid-1980s both Ceefax and ORACLE were broadcasting several hundred pages on every channel, slowly changing them throughout the day. The "Broadcast Teletext Specification" was published in September 1976 jointly by the IBA, the BBC and the British Radio Equipment Manufacturers' Association. The new standard also made the term "teletext" generic, describing any such system. The standard was internationalised as World
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