Downloadable application programming interface (API) software; downloadable and recorded virtual reality software for providing virtual reality experiences, navigating a virtual reality environment, operating virtual reality headsets, object tracking, motion control and content visualization, as well as for users to experience virtual reality visualization, manipulation and immersion, and for interactive entertainment; downloadable and recorded augmented reality software for providing virtual reality experiences, navigating an augmented reality environment, operating augmented reality headsets, object tracking, motion control and content visualization, as well as for users to experience augmented reality visualization, manipulation and immersion, and for interactive entertainment; downloadable and recorded mixed reality software for providing virtual reality experiences, navigating an augmented reality environment, operating augmented reality headsets, object tracking, motion control and content visualization, as well as for users to experience augmented reality visualization, manipulation and immersion, and for interactive entertainment; virtual reality glasses; headsets for virtual reality games; virtual reality headsets; downloadable and recorded virtual reality software for integrating electronic data with real world environments in the field of education; downloadable and recorded virtual reality software for integrating electronic data with real world environments in the field of cinematography; downloadable virtual reality computer game software; downloadable and recorded virtual reality simulation software for simulating classroom instruction for training in the field of education; downloadable and recorded virtual reality simulation software for simulating laboratory research and laboratory equipment for training in the field of science; downloadable and recorded virtual reality software for playing computer games; virtual reality headsets and helmets adapted for use in playing video games; downloadable virtual reality software for playing computer games; electronic controllers for use with virtual reality headsets; downloadable and recorded virtual reality simulation software for simulating computer instruction and computer usage for training in the field of information technology