Purely historic question: VT200 text graphic programming

[Charles Turner]

On Thu, 10 Mar 2011 00:38:11 -0600, GrayShark <howe.steven at gmail.com>
declaimed the following in gmane.comp.python.general:

> Once, many, many, years ago, I programmed some type of 'graphical'
> interface on a VT200 terminal

A wild guess: Prestel? Bildschirmtext? Telidon? Teletex? NAPLPS?