RE: https://mastodon.social/@ricmac/115691254009259024
Engelbart's demo is well worth checking out. SRI has a nice 5 minute highlight cut: https://www.youtube.com/watch?v=B6rKUf9DWRI
Xerox PARC developers cite him as a direct inspiration for the Xerox Star (http://toastytech.com/guis/star.html) and Alto, which in turn famously inspired Apple and Microsoft.
In the other direction, the chain goes to Vannevar Bush's Memex (https://history-computer.com/products/memex-guide/), and from there to early 20th century concepts such as Paul Otlet's Répertoire bibliographique universel: https://fr.wikipedia.org/wiki/R%C3%A9pertoire_bibliographique_universel