Essentially, virtual reality is about the navigation and manipulation of 3D computer-generated environments. A VR user is able to navigate by walking, running or even flying through a virtual environment and explore viewpoints that would be impossible in the real world. But the real benefit of VR is the ability to touch, animate, pick up and reposition virtual objects and create totally new configurations. Key topics: The origins of VR, How VR works, and how VR is being used.