3 terms
6DoF, or six degrees of freedom, is XR tracking that follows both the position and rotation of a headset or controller along three axes each.
Hand tracking lets an XR headset follow the position and finger joints of bare hands with cameras, so users can point, pinch and grab without controllers.
Inside-out tracking lets an XR headset find its own position and orientation with cameras and sensors built into it, without external base stations.