In the digital computing world, VR means a real-time environment created by digital computing. It means that the environment does not exist on Earth, but can be experienced with digital computing. However, it is not always necessary that VR always replicates a real environment. It has the ability to replicate an imaginary world or environment, which can be displayed on a computer screen or a VR headset (head-mounted display) device (image source: https://lh3.ggpht.com/uv8mx61-jsrbcu-EPNw1wIi4BCXg7338alepVlr7xKbKJf7eZ9EXT2U3roA8SWx1RC8=h900-rw):
The VR concept seems to represent modern technology, but the fact is that the VR concept was introduced around the second quarter of the twentieth century. In 1935, Stanley G. Weinbaum wrote a short science fiction story Pygmalion's Spectacles in which a description of a goggle is found. The goggle described a holographic recording of fictional experience with touch and smell...