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'''Newton's Apple''' was a TV program on PBS that in circa . In 1993 it ran a program on [[virtual reality]] and that showed a variety of VR systems , including polarized an active-shutter glasses -based 3D in front of display based on a CRT computer monitor , and a full body-mounted gyroscope VR system.<ref> Virtual Reality on Newtons Apple https://www.youtube.com/watch?v=u1A3SmtLW_0</ref> ==References==<References/>