Virtual reality emphasizes on the construction of interactive 3D virtual/mixed environments, and how to interact within such environments through different sensory channels, such as audio, vision and gesture.  Virtual Reality has many applications.  The most popular ones include 3D computer games and virtual walkthrough, which have attracted a lot of attention.  This course aims at introducing both basic and advanced virtual reality techniques and their applications.  It also discusses human factors and evaluation techniques for virtual reality applications.