IT World is running a fun article on features that we’ve lost from our computers over the years. While the common perception is that technology is always getting better, it does occasionally happen that a really useful concept or feature vanishes, never to reappear.
(My favorite, which isn’t in the article, was the old SCO Unix capability to turn all of the text in a terminal window red if you were logged in as root. It was so simple, but such a great visual clue.)