Teletext default graphics mode (mode 7) was based on Teletext display, and the computer could be used to create and serve Teletext-style pages over a modem connection. With a suitable adapter, the computer could receive and display teletext pages, as well as software over the BBC's Ceefax service, for a time. The Philips P2000 home computer's video logic was also based on a chip designed to provide teletext services in TVs. Prestel was a British information-retrieval system based on teletext protocols. However, it was essentially a different system, using a modem and the phone system to transmit and receive the data,
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