> Capability based security, ... They had it at Xerox PARC, but Steve Jobs chose not to take that part. To be fair: 1) Apple II and Macintoshes were slow 2)

> Capability based security, ... They had it at Xerox PARC, but Steve Jobs chose not to take that part. To be fair: 1) Apple II and Macintoshes were slow 2) and single user 3) and pre-Internet (no networking, even.) Microsoft also had to make an early choice about what features to add to DOS, particularly networking or multiuser, and networking was chosen to implement first. (Probably because of Novell and other early networking competitors.) > the PARC focus on replicating paper was a step backwards "Replicating paper" was resurrected about 10 years ago when everybody was making apps with a UI like books turning pages. There was actually a programmer (Russian name if I receall) who specialized in consulting on that, advising companies on what algorithms to use and how to get the page flipping appearance they wanted. I thought it was pointless but hilarious, as it was totally ornamental. https://en.wikipedia.org/wiki/Skeuomorph https://en.wikipedia.org/wiki/Skeuomorph