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.
Ron Headrest
During the 1980s, Garry Trudeau thought it would be fun to do a political parody of the television program "Max Headroom" (of which he was a fan). He combined the concept with then-president Ronald Reagan, to produce Ron Headrest, the world's first electronically simulated politician. (The name "Headrest" was a humorous allusion to the frequent and lengthy naps that Reagan was notorious for.)