I had not heard of this man till today when I came across the comment below by Alan Kay; I thought to share it:

"I don't think you could find a physicist who has not gone back and tried to find out what Newton actually did. It's unimaginable. Yet the computing profession acts as if there isn't anything to learn from the past, so most people haven't gone back and referenced what Engelbart thought."

For context.

Englebart is my new hero.

"The rate at which a person can mature is directly proportional to the amount of embarrassment he can tolerate."

-Doug Engelbart

http://www.dougengelbart.org/kids/justforkids.html#4

I once slept in a guest room in an Oxford flat where Doug had previously slept, as we both know Ted Nelson.

Ted told me that was a valid anecdote, so who am I to argue?