“…Another trend in CAI is the exploration of interactive video systems. Interactive video systems can integrate sound, still pictures, film, and computer text and graphics into one manageable medium (Wyatt 1984, Chung 1985, Kramsch, Morgenstern, and Murray 1985, Webb 1985, Little and Davis 1986, Niesz 1986, Stevens 1986, Howlett 1986, Sutherland 1986. A video disc can be played back from any part of the recording and thus is a better device.…”