On 1968-12-09, Douglas C. Engelbart and the group of 17

researchers working with him in the Augmentation ResearchCenter at Stanford Research Institute in Menlo Park,

California, USA, presented a 90-minute live public

demonstration of the on live system, NLS, they had been

working on since 1962. The presentation was a session in the

of the Fall Joint Computer Conference held at the Convention

Center in San Francisco, and it was attended by about 1000

computer professionals. This was the public debut of the

computer mouse, hypertext, object addressing, dynamic file

linking, and shared-screen collaboration involving two persons

at different sites communicating over a network with audio and

video interface.