different between videotex vs alphageometrics

English

video +? text

videotex (usually uncountable, plural videotexes)

Any of various early information retrieval services, such as viewdata and Teletext systems, that delivered pages of computerized text to users on request.
- 1980, IEEE Computer Society, Computer
  A variety of extensions of this basic videotex terminal can be foreseen.
- 1984, The Radio and Electronic Engineer
  In this paper, the development of a microprocessor based system for converting videotex pages to synthetic speech in real time, for the benefit of blind people, is described.

From alphabetical and geometric, perhaps modelled on alphanumerics or similar.

alphageometrics (uncountable)

A display made up of text characters combined with vector graphics (once an advanced form of videotex, introduced by the Telidon system).

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