Category: Extended reality; virtual reality; augmented reality; mixed reality; XR; VR; AR; MR; virtual reality continuum; immersive multimedia; computer generated; immersive; 3D world; head-mounted display; HMD; AR glasses; smart glasses; smart eyeglasses; goggles; heads-up display; HUD; virtual retina display; VRD; haptics; head-tracking; eye-tracking; field of view; FOV; VR apps; AR apps; VR software; AR software; Wearable computing