This document discusses augmented reality (AR), defining it as a type of virtual reality that combines real and computer-generated scenes. It distinguishes AR from virtual reality by noting AR enhances real environments while VR replaces reality. Examples of AR applications like Wikitude, Layar and Google Glass are provided. The document also outlines several industries where AR is used and discusses advantages like uniqueness, personalization and virality, as well as disadvantages like privacy concerns, advertising issues, and physical dangers.