Teletext systems the country being closed captioning, TV Guide On Screen, and Extended Data Services (XDS). A version of the European teletext standard designed to work with the NTSC television standard used in North America was first demonstrated in the US in 1978 by station KSL in Salt Lake City, Utah, premiered a teletext service using Ceefax. They were followed by American television network CBS, which decided to try both the British Ceefax and French Antiope software for preliminary tryouts for a teletext service, using station KMOX (now KMOV) in St. Louis, Missouri as a testing ground. CBS decided on Antiope and
Teletext Ltd. editorial on ch 986 on Freesat. The GameCentral section continued online on the Teletext website before joining another DMGT website Metro and can now be found at http://www.metro.co.uk/tech/games/ Despite the withdrawal of news and information content, the service continued to broadcast. On 29 January 2010, the broadcasting regulator Ofcom revoked Teletext's licence to broadcast but as of the service was still on the air. On 27 May 2010, Ofcom imposed a financial penalty of £225,000 on Teletext Limited following the revocation of the public teletext service licence. Ofcom regulations state: "Public service broadcasting licences are offered for a fixed term,