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. in conjunction with ORACLE, as an auxiliary teletext provider for Channel 4 from 1982. 4-Tel occupied pages 410-469 within ORACLE's page space. When ORACLE lost its licence and was replaced by Teletext Ltd in 1993, 4-Tel moved to its own page space on pages 300-399 (effectively its own magazine). Channel 4 enlisted Intelfax to run the service. In 2002, 4-Tel was renamed FourText. In addition, FourText also launched on digital television. In 2003, Channel 4 ended their contract with Intelfax and contracted out the service to Teletext Ltd. The new service was named Teletext on 4 and operated on pages