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On December 9, 1968, Douglas Engelbart, who was a pioneer in theoretical computer development and an influential inventor at Stanford Research Institute, gave a presentation at the Association for Computing Machinery / Institute of Electrical and Electronics Engineers (ACM/IEEE)—Computer Society's Fall Joint Computer Conference in San Francisco.
This presentation, which has come to be known as the Mother of All Demos, included a number of then-hypothetical ideas in computing technology which have since come to be an everyday part of life. Engelbart and his team theorized and then demonstrated (often via realtime simulation), concepts which we today know as the mouse, the concept of copy and paste, the graphical user interface, collaborative editing, hypertext, and email.
This is an actual quote from the demo: "An advantage of being online is that it keeps track of who you are and what you're doing all the time."
Has a somewhat different connotation today than it did in 1968...