9 Head mounted video display for use with computer simulated reality, namely, virtual reality, augmented reality and mixed reality; computer hardware; downloadable, recorded software for computer simulated reality, namely, virtual reality, augmented reality and mixed reality, for use in playing computer games, pilot training, medical teaching; downloadable, recorded virtual reality game software; handheld controllers for remotely controlling head mounted video displays, for use in the environment of computer simulated reality, namely, virtual reality, augmented reality and mixed reality; optical devices, namely, eye pieces for head mounted video displays; carrying cases and holders specially adapted for use with headsets for computer simulated reality, namely, virtual reality, augmented reality and mixed reality