Ivan Sutherland's Sketchpad: The First Interactive Computer Graphics

David Carroll · Demo · YouTube title: Sketchpad, by Dr. Ivan Sutherland with comments by Alan Kay

Why it's here

HN points people to it as the canonical demo of early interactive graphics, constraints and objects, and as one of Alan Kay's favorite things to show.

What it covers

Earliest known footage of Ivan Sutherland's MIT PhD work, Sketchpad, the first computer graphics system, with commentary by Alan Kay. It shows light-pen drawing with constraints in a short clip.