Teletel System Terminal
Tag Archives: videotex
We interrupt your scrolling with an important message. These are the different standards for videotex, a protocol somewhere inbetween teletext and internet.
It wasn’t all pure text-mode. Videotex also had vector graphics and the ability to change fonts, and plenty more things. Telidon was perhaps the most widely used videotex standard, or so it seems today.
Not sure if they ever got around to a world standard, like they did with teletext (which was a techno-battle between France and the UK).
Prodigy (online service), pictures by Benj Edwards.
The service was presented using a graphical user interface. The Data Object Architecture wrapped vector and incremental point graphics, encoded as per the North American Presentation Level Protocol Syntax NAPLPS, along with interpretative programs written in the proprietary languages TBOL (Trintex Basic Object Language) and PAL (Prodigy Application Language). NAPLPS was authored in 1979 by Jerry Soloway and Bill Frezza from Bell Laboratory and Bob Bedard from CBS Laboratory.
Environment Canada Weather Channel using the alphageometrical videotex protocol Telidon. From the mid 1980s. Thanks to Frederic Cambus for sharing.
(Source: http://www.youtube.com/)