Example image of eyePlorer eyePlorer map for 'Teletext': Television United Kingdom Closed captioning Subtitle BBC Bandwidth (computing) BT Group General Post Office Viewdata Ceefax Independent Television Authority ORACLE (teletext) Prestel ASCII Transistor–transistor logic Wireless World 1980s CEPT1 World System Teletext Department of Canadian Heritage NAPLPS Vertical blanking interval Decoder PAL NTSC SECAM Europe Random-access memory World Wide Web Broadcasting (computing) Internet September 11 attacks Digital television MHEG-5 Multimedia Home Platform Bit rate Canadian Broadcasting Corporation Montreal Toronto Antiope (teletext) CBS KMOV North America St. Louis, Missouri United States KCBS-TV Los Angeles KSL-TV Salt Lake City Federal Communications Commission