BBC In 1951, in conjunction with Oxford University Press the BBC published "The BBC Hymn Book" which was intended to be used by radio listeners to follow hymns being broadcast. The book was published both with and without music, the music edition being entitled "The BBC Hymn Book with Music". The book contained 542 popular hymns. The BBC provided the world's first teletext service called Ceefax (near-homonymous with "See Facts") on 23 September 1974 until 23 October 2012 on the BBC 1 analogue channel then later on BBC 2. It showed informational pages such as News, Sport and the Weather. on
Teletext economic Teletext system with 1971 technology. However, as low cost was essential to the project's long term success, this obstacle had to be overcome. Meanwhile, the General Post Office (GPO), whose telecommunications division later became British Telecom, had been researching a similar concept since the late 1960s, known as Viewdata. Unlike Teledata which was a one-way service carried in the existing TV signal, Viewdata was a two-way system using telephones. Since the Post Office owned the telephones, this was considered to be an excellent way to drive more customers to use the phones. In 1972 the BBC demonstrated their system,