Videotex

Minitel, officially known as TELETEL, was an interactive videotex online service accessible through telephone lines. It was the world's first and most successful mass-market online service prior to the World Wide Web. It was developed in Cesson-Sévigné, Brittany, by government-owned France Télécom.

thumb|Videotex example screen showing its graphics capabilities, 1978. As in teletext, predefined, fixed-width graphics characters in multiple colors could be used to create an image. thumb|Minitel was perhaps the most successful videotex service worldwide, using this terminal, .

thumb|Image rendered using IBM Monochrome Display Adapter|MDA block graphics thumb|Color image rendered using World System Teletext|Teletext semigraphic characters

British microcomputer company