Of course, Xanadu is (or would be) a digital remake of Vannevar Bush's memex: http://www.theatlantic.com/doc/194507/bush
Frankly, I'm not sure Ted Nelson has added much to the original concept with Xanadu.
You can download Xanadu(R) Space(TM), a user interface demo, from here: http://xanarama.net/ Windows only, but I got it to work in WINE. Ted Nelson really likes his trademarks, probably because it's as tangible as Xanadu has become after 40 years.
Of course, Xanadu is (or would be) a digital remake of Vannevar Bush's memex: http://www.theatlantic.com/doc/194507/bush Frankly, I'm not sure Ted Nelson has added much to the original concept with Xanadu.
You can download Xanadu(R) Space(TM), a user interface demo, from here: http://xanarama.net/ Windows only, but I got it to work in WINE. Ted Nelson really likes his trademarks, probably because it's as tangible as Xanadu has become after 40 years.