We often take CG for granted in modern films—everything from sci-fi flicks to action-heavy blockbusters include plenty of computer generated visuals. But in 1964 the process wasn't quite so widespread.
In this film from AT&T's archives, Computer Technique For the Production of Animated Movies, you can see just how CG animations were first created decades ago. And the 16-minute film doesn't just explain how the process works, it's also an example... as the introduction explains "this very film was produced entirely by the process which is about to be described."
For those of you hungry for more knowledge about the industry, and how it got to where it is today, this is definitely worth a watch.