Augmented Reality
Description
"Augmented reality combines features of a virtual environment with the real world. Most often, the augmentation is visual, with a user sporting an eyepiece connected to a wearable computer and positioning equipment. By tracking where the user’s head is and what he is seeing, the computer is able to overlay graphics and/or text onto his vision." (http://www.sciy.org/blog/INTROtoSCIY/RichCarlson/_archives/2008/6/10/3737885.html)