and much more than that in the early digital era?
Douglas Engelbart, who passed away on July 2, 2013.
Arik Hesseldahl at AllThingsD has the story in:
Computing Pioneer Douglas Engelbart Has Died at Age 88.
See the Stanford University website providing videos of Engelbart's now famous demo presentation of the digital world of tomorrow which is described there as follows:
"On December 9, 1968, Douglas C. Engelbart and the group of 17 researchers working with him in the Augmentation Research Center at Stanford Research Institute in Menlo Park, CA, presented a 90-minute live public demonstration of the online system, NLS, they had been working on since 1962. The public presentation was a session of the Fall Joint Computer Conference held at the Convention Center in San Francisco, and it was attended by about 1,000 computer professionals. This was the public debut of the computer mouse. But the mouse was only one of many innovations demonstrated that day, including hypertext, object addressing and dynamic file linking, as well as shared-screen collaboration involving two persons at different sites communicating over a network with audio and video interface."