Ceefax

Ceefax (phonetic for "See Facts") was the world's first teletext information service. It was started by the BBC in 1974, and ran regularly filling BBC Two's overnight schedule as Pages from Ceefax. The interactive service ran until 23:32:19 BST on 23 October 2012, in line with the digital switchover being completed in Northern Ireland. The service then ceased after 38 years of broadcasting.