Augmenting human intellect

I think Engelbart's achievements after reading his "augmenting human intellect".
He made the thing that was unbelievable at that time.
Common computer's input, output was hollerith cards and paper printouts, and computer- human interaction was batch processing in 1960.
Because of Engelbart, however, computer was personal computer that had mouse, 2D screen, and used hypertext.
The user of computer was prefessional who had technical knowledge of computer, but Engelbart brought the spread of computer user.
In other words, people didn't need technical knowledge about using computer.