Early computer animation

I’ve been trying to find early examples of computer animation. So far the earliest movie that I’ve seen with computer animation is Futureworld (1976). It contains a brief shot of a primitive 3D model of a human head.
According to George D. DeMet , 2001: A Space Odyssey (1968) contains no computer generated effects, but there is a shot where a video monitor shows what appears to be a rotating 3-dimensional model of an antenna. I suppose this could have been done using traditional 2D animation techniques.

Tron (1982) is another early movie using computer effects.

The Abyss (1989) has computer generated effects of water changing shapes.

Terminator 2: Judgement Day (1991) has the liquid metal guy.

Toy Story is the first feature length film done with 3D computer animation, but it is unusual because it, unlike these other films, will be remembered for its excellent, heartwarming story.