About Douglas Engelbart:
Douglas Carl Engelbart is best known for his work on founding the field of human–computer interaction, particularly while at his Augmentation Research Center Lab in SRI International, resulting in the invention of the computer mouse, and the development of hypertext, networked computers, and precursors to graphical user interfaces. These were demonstrated at The Mother of All Demos in 1968. Engelbart's Law, the observation that the intrinsic rate of human performance is exponential, is named after him.
The digital revolution is far more significant than the invention of writing or even of printing.
Douglas Engelbart