Ceefax (phonetic for "See Facts")'s the BBC's teletext information service transmitted via the analogue signal, starting in 1974 and running until 2012. History The system was announced in October 1972 and following test transmissions in 1973-1974 the Ceefax system went live on the 23 September 1974 with thirty pages of information. Developed by BBC engineers who were working on ways of providing televisual subtitles for the deaf, it was the first teletext system in the world. The then-BBC D… (More on Ceefax)