Cameras; Digital cameras; Digital video cameras; Motion capture cameras; Motion capture systems for monitoring, analyzing, measuring, and recording motion; Downloadable motion capture software; Motion capture accessories, namely, motion tracking devices, camera lenses, lens focus tools, motion capture markers, marker bases, marker posts, marker adhesive, inertial measurement sensors, measuring instrumentation and apparatus in the nature of digitizing probes, motion capture suits, Ethernet cables, USB cables, camera cables, data synchronization cables, optical signaling cables, cables for electrical or optical signal transmission, signal splitters for electronic apparatus, cable splitters, electrical connectors, Ethernet switches, Power over Ethernet (PoE) network components in the nature of switches, calibration instruments, network cards, USB computer security keys; Downloadable software for object tracking; Optical measurement apparatus; Computer hardware and software systems for controlling a computer game or computer simulator based on head movement; Telecommunication base stations; Camera lens adapters; Camera lens mounts; Camera lens filters; Portable electronic devices for monitoring and analyzing human movement