(1) modeling equipment (e.g., 3D scanners);
(2) 3D visual display equipment (e.g., 3D display systems, large-scale projection systems (e.g., VR-Platform CAVE), head-mounted stereoscopic displays, etc.);
(3) sound equipment (e.g., sound systems in three dimensions, as well as stereo sound in a nontraditional sense) and<
(4) interaction devices (including position trackers, data gloves, 3D input devices (3D mice), motion capture devices, eye trackers, force feedback devices, and other interaction devices).