Founding Visionaries: Douglas Engelbart's The Mother of All Demos (1968)
Before Engelbart, computers were typically just number crunching tools or radar displays with a few buttons.
He envisioned and brought about most of what we still use today, and showcased it in what’s come to be known as The Mother of All Demos.
The 90-minute presentation essentially demonstrated almost all the fundamental elements of modern personal computing: windows, hypertext, graphics, efficient navigation and command input, video conferencing, the computer mouse, word processing, dynamic file linking, revision control, and a collaborative real-time editor (collaborative work).