The iPhone Compass app also has a spirit level – just swipe to the next page to access it. You’ll see two white bubbles on a black screen. When the bubbles align, the screen turns green.
The terms "hypertext", "hypermedia" and "virtuality" were coined by Ted Nelson in the 1960s. This was way before the invention of the World Wide Web by Sir Tim Berners-Lee. Nelson, one of the great futurists of the last century, had written about the idea of a global network of computers in his books. He called his network Xanadu. Incidentally, in the reference list of original proposal for the World Wide Web, Tim Berners-Lee had put Ted Nelson's work at the top place. [more...]