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.
Thomas A. Furness III
Thomas A. Furness III is an American inventor, professor, and virtual reality pioneer based in Seattle, Washington. He is a Professor in the University of Washington Department of Industrial & Systems Engineering, and the founder of the Human Interface Technology Lab at the University of Washington and its sister labs at the University of Canterbury and University of Tasmania. Known for his contributions in developing human interface technology, he has earned the title, "Grandfather of Virtual Reality."