Wearable electronic hardware; computer software for recording, storing, transmitting, receiving, displaying and analyzing data from wearable electronic hardware; wearable electronic hardware and computer software for indoor and outdoor navigation and landmark recognition; virtual, augmented, or mixed reality software implemented in wearable electronic hardware for a user to interact with virtual, augmented or mixed reality environments and content in the field of education, entertainment, art, games, music, performances, sports, communication, general interest, and business; electronic hardware for virtual, augmented, or mixed reality applications and environments; scientific, photographic, cinematographic, optical, and teaching apparatus and instruments, namely, wearable electronic hardware and computer software for use in enabling computers, handheld consoles, tablet computers, mobile devices, and mobile phones to provide augmented or mixed reality world experiences; wearable electronic hardware and computer software for recording and other digital recording media, namely, audio recorders and video recorders; computer software programs for transmitting, receiving, downloading, sharing, displaying, and interacting with audiovisual content, documents, files and data in the field of business and entertainment; wearable electronic devices comprised primarily of software and display screens in connection with computers, tablet computers, mobile devices, and mobile phones to enable virtual, augmented, or mixed reality world experiences; virtual reality glasses, namely, goggles for enabling virtual, augmented, or mixed reality world experiences; 2-dimensional and 3-dimensional head-mounted video displays; human-computer interface hardware, namely, headsets, remote control units, and wearable peripherals for connecting with computers and portable computers; human-computer interface software for interacting with and transferring and receiving audio-visual content, documents, files, and data in the field of business and entertainment; video display hardware, video display software; near-eye display optics, namely, optical receivers; virtual, augmented, or mixed reality game software