Also see How Doug Engelbart Pulled off the Mother of All Demos | Wired and 50 years ago, Douglas Engelbart's ‘Mother of All Demos’ changed personal technology forever | Mashable
"FIFTY YEARS AGO today, Doug Engelbart showed 2,000 people a preview of the future.50 Years Later, We Still Don't Grasp the Mother of All Demos | Wired
Engelbart gave a demonstration of the "oN-Line System" at the Fall Joint Computer Conference in San Francisco on Dec. 9, 1968. The oN-Line System was the first hypertext system, preceding the web by more than 20 years. But it was so much more than that. When Engelbart typed a word, it appeared simultaneously on his screen in San Francisco and on a terminal screen at the Stanford Research Institute in Menlo Park. When Engelbart moved his mouse, the cursor moved in both locations.
The demonstration was impressive not just because Engelbart showed off Google Docs-style collaboration decades before Google was founded. It was impressive because he and his team at SRI's Augmentation Research Center had to conceive of and create nearly every piece of technology they displayed, from the window-based graphical interface to the computer mouse."