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.
Louis B. Rosenberg
In 1993, Rosenberg founded the virtual reality company, Immersion Corporation which went public in 1999 (NASDAQ: IMMR) and remains a public company today. He served as the company's CEO until 2000. Rosenberg also founded Microscribe, a company that developed the first desktop 3D digitizer - a system that allows animators to digitize physical objects into 3D computer models. The Microscribe 3D digitizer was used in the production of many major feature films including Shrek, Ice Age, Bugs Life, and Titanic. Rosenberg also founded Outland Research, a company specializing in advanced methods of human-computer interaction. In 2011, Google purchased Outland Research technologies, along with its patents.