Sketchpad: Constraint-based 2D CAD sketching prototype from 1963

cross-posted from: https://lemmy.world/post/13859444

Great tech demonstration here, just a few steps below the Doug Engelbart demo in how futuristic it must have seemed, IMHO. Loved the light pen and macro-pad interface.

Also, your speakers are fine. The audio for me played mono and right channel only.