Wearable technology
The creation of the first virtual reality headset can be credited to Cinematographer Morton Heilig. He created a device known as the Sensorama in 1962. The Sensorama was a videogame like device that was so heavy that it needed to be held up by a suspension device.
Artificial Reality
Artificial reality is a book series by Myron W. Krueger about interactive immersive environments (or virtual realities), based on video recognition techniques, that put a user in full, unencumbered contact with the digital world. He started this work in the late 1960s and is considered to be a key figure in the early innovation of virtual reality. "Artificial Reality" was published in 1983 and updated in "Artificial Reality II" in 1991 (both published by Addison-Wesley).