The guy who basically invented nearly everything most people think of when they think “computer” has abended.

In addition to the computer mouse, Engelbart’s work at SRI from 1957 to 1977 helped develop tech innovations such as display editing, online processing, linking and in-file object addressing, use of multiple windows, hypermedia, and context-sensitive help, the institute said.

Add to that WYSIWYG, video conferencing, and collaborative real-time editing.

Engelbart’s Mother of All Demos is perhaps the greatest virtuosic achievement in practical applied computing technology ever, akin to someone in second-century BC Rome building a functioning 747 in a stable, rolling it down the Appian Way and taking off.