Wii or Kinect sports games may provide _____ recreation to help stroke and injury victims recover faster. Smartphones often come with scaled-down versions of games such as _____ to introduce games to users. Role-playing, action, educational, and simulations are examples of computer and video game _____. Head-mounted displays often use organic light emitting diode, or _____, technology. Windows and Apple offer_____ , which contain tools for creating 2-D and 3-D drawings, game-playing interfaces, and multiplayer control.