Teletext systems network in the mid-late 1970s. Due to the adoption of a common teletext standard (WST), the ORACLE system ceased in 1976. The name was retained for the service itself, that continued after that year using the WST standard. "World System Teletext" (or "WST") is the name of a standard for teletext throughout Europe today. Almost all television sets sold in Europe since the early ’80s have built-in WST-standard teletext decoders as a feature. It originally stems from the UK standards developed by the BBC (Ceefax) and the UK Independent Broadcasting Authority (ORACLE) in 1974 for teletext transmission, extended in 1976
Teletext to the TV station. These services have since been superseded by the World Wide Web. With the advent of digital television some countries adopted the name "digital teletext" for newer standards, despite the older teletext standards' digital nature. "Digital teletext" is encoded with standards including MHEG-5 and Multimedia Home Platform (MHP). Other countries use the same teletext streams as before on DVB transmissions, due to the DVB-TXT and DVB-VBI sub-standards. Those allow the emulation of analog teletext on digital TV platforms, directly on the TV or set-top box, or by recreating analog output, reproducing the vertical blanking interval data in