Virtual reality
Around the same time, Douglas Engelbart used computer screens both as input and output devices. In 1968, Ivan Sutherland, with the help of many students including Bob Sproull, created what was widely considered to be the first head-mounted display (HMD) system for use in immersive simulation applications. It was primitive both in terms of user interface and realism, and the HMD to be worn by the user was so heavy that it had to be suspended from the ceiling. The graphics comprising the virtual environment were simple wire-frame model rooms. The formidable appearance of the device inspired its name, The Sword of Damocles.
Virtual reality headset
Virtual Reality was used by Nintendo's Wii game console by having the player use a controller to interact with the game of their choice, often being sports games. Soon after the release of Nintendo's Wii, Xbox released a full body reading system called "Kinect" and PlayStation released a similar virtual reality device named "PlayStation Move." These gaming devices use virtual reality to control avatars within a game, where the player's movements are copied by the avatar to complete the game. This means that the player is not truly engaged in the virtual reality world.