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
Teletext Ltd. requiring the holder to provide the licensed service throughout the licence period. In accepting a licence, the broadcaster takes account of the likely cost of the obligations under the licence, and the value of the benefits associated with the licence, for the duration of the licence period." Teletext’s licence was for the licence period 2004 to 2014. The main Teletext service on Freeview was removed from channel 100 on the EPG on 21 June 2010. Teletext Holidays went digital in January 2011. In a deal between BBC Worldwide and Inview Technology Ltd, Teletext Extra was relaunched as Radio Times Extra