Virtual reality headsets; augmented reality headsets; mixed reality headsets, namely, headsets with combined virtual reality and augmented reality technology; downloadable virtual reality computer software for business management and for assisting in the development of advanced AR/VR business software applications; downloadable augmented reality computer software for business management and for assisting in the development of advanced AR/VR business software applications; mixed reality computer software, namely, downloadable computer software containing virtual reality and augmented reality technology for business management and for assisting in the development of advanced AR/VR business software applications.