Teletext in Salt Lake City, Utah premiered a teletext service using Ceefax. They were followed by television network CBS, which carried out preliminary tests on both the British Teletext and the rival French Antiope system. One of the most prominent providers was the "Electra" teletext service, using World System Teletext (WST), broadcast from the early 1980s on American cable channel WTBS. Electra also carried another teletext service on its higher-numbered pages, a service called "Tempo". "Tempo" mainly carried sports (and other miscellaneous) information on its pages. At the time of Electra's closing in 1993, it was the only existing teletext service
MediaCorp Teletext was initially launched. It was later expanded to Channel News Asia when the channel was launched on 1 March 1999. Teletext Classifieds was shut down on 1 September 2012. On 3 September 2013, MediaCorp announced that the service will be discontinued from 30 September 2013 due to “declining usage”. Teletext was provided on three MediaCorp channels, with each channel specialising in specific types of information. Teletext on Channel 5 specialised in entertainment and lifestyle information, Classifieds on Channel 8 and business information on Channel News Asia. When the service was still online, the Teletext versions of all three channels were