I'm a PC, long before a Mac
One of the most significant things Engelbart said, relates to personal access to enable users to collaborate and access shared computer resources. In the 1960s computers were large machines in housed in specially designed machine rooms, where men in white coats nurtured the precious hardware.
It was described by as the mother of all demos. On December 9th 1968 Doug Engelbart and a group of researchers from the Augmented Human Intellect (AHI) Research Center at Stanford Research Institute gave a public demonstration of how they saw IT would change the way people work.
The 90 minute demo to 1000 computer professional was the first public showing of a mouse, hypertext linking and significantly the concept of personal computing.