ORACLE (teletext) ORACLE (teletext) ORACLE (from "Optional Reception of Announcements by Coded Line Electronics") was a commercial teletext service first broadcast on the ITV network in the mid-late 1970s and later on Channel 4 in the United Kingdom, finally ending on both channels at 23:59 UTC on 31 December 1992. It was developed and launched by a consortium backed by the Independent Broadcasting Authority at about the same time as the BBC's Ceefax service. Due to the lack of available receivers, exact launch dates have been left obscure. Receivers became popular around 1980. In Britain ORACLE, ITV's teletext service, was launched as
Electra (teletext) operation. A few other services were offered by some large-market TV stations in the US throughout the 1980s, such as "Metrotext" from KTTV in Los Angeles and "KeyFax" from WFLD in Chicago. 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 in the USA. Electra (teletext) Electra was a teletext service in the United States that was in operation from the early 1980s up until 1993, when it was