Douglas Engelbart Demonstrates Hypertext, Text Editing, Windows, Email and a Mouse: "The Mother of All Demos"

On December 9, 1968 Douglas Engelbart of the Stanford Research Institute, Menlo Park, California, presented a 100 minute demonstration  at the San Francisco Convention Center of an “oNLine System” (NLS), the features of which included hypertext, text editing, screen windowing, and email. To make this system operate, Engelbart used the mouse which he had invented the previous year.

Numerous still images, a complete video stream of the demo, and 35 brief flash streaming video clips of different segments, were available from the Engelbart Collection at Stanford University at this link.

A "complete version" is available from YouTube: