Telidon (1978) was a Canadian videotex service with both text and vector graphics. It could be used for mass communication on TV, or two-way communication using modems. Telidon required more complex decoding than its competitors, normally using Z80 or 6809 processors. Via.
Toxic Wastes from A to Z (coming after you and me) by John Fekner is a parody of a children’s alphabet learning aid which runs alphabetically through a list of toxic pollutants. Martin Nisenholtz invites John Fekner, Andy Warhol, Keith Haring and others to experiment with an early interactive computer graphics system (Telidon) at New York University’s Alternate Media Center (Interactive Telecommunications Program). Fekner received his first international award at Toronto’s Video Culture Festival in the Videotex category.
Graphic Variations on Telidon by Pierre Moretti (1979, 07 min 58 ) The Telidon System was a videotex/teletext service developed by the Canadian Communications Research Centre (CRC) during the late 1970s and early 1980s.