As was the case with most of the early videotex experiments, the size of the subscriber base failed to meet expectations, and the effort was shut down in 1985.
In a strict definition, videotex is any system that provides interactive content and displays it on a television, typically using modems to send data in both directions.
The tie between his online shopping systems and the innovative information systems he created is the concept that videotex was a new, mass communications medium.
National videotex services were encouraged to follow one of the existing four basic profiles; or if they extended them, to do so in ways compatible with a harmonised enhanced specification.
At about the same time, other organizations were developing videotex systems, similar to teletext except they used modems to transmit their data instead of television signals.
