Ubiquitous Computing
http://www.ubiq.com/hypertext/weiser/UbiHome.html
There is a joke that everything available for the personal computer was created at Xerox PARC (the Xerox research and development institute in Palo Alto, CA) in the 1960's. For the most part this is probably true, including the term ubiquitous computing. This site explains what ubiquitous computing is, why it is just the opposite of virtual reality, and what types of applications are being designed to make ubiquitous computing a reality. You also can find some neat-o cartoons about ubiquitous computing.