Engelbart is a genius ahead of his time - at a time computers were huge boxes only used for corporations and government, he introduced the concept of personal computing and showed how powerful a GUI can be.

People often credit Xerox PARC and Steve Jobs for popularizing the GUI, but to me Engelbart, as an academic, deserves more credit than both.

The Mother Of All Demos (1968) https://youtu.be/yJDv-zdhzMY