The Mother of All Demos

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It was 40 years ago today that Douglas Engelbart gave a demonstration that introduced the public to an impressive list of technologies which would in the following years become established in the mainstream. On the 9th of December, 1968, he demonstrated:

a mouse;
hypertext (i.e. text with links that can be followed — a precursor to the Web);
e-mail; and
video conferencing.

It also demonstrates copy and paste, which although not completely new at the time, was still not especially common. A video of the demonstration can be seen on Google Video.