image-guided surgery, medical imaging and informatics products and medical products, namely, computer software for electronic imaging during medical procedures; computer software for image-guided surgery, medical imaging and informatics; computer software and hardware, comprising integrated treatment, planning and delivery systems which generate images allowing surgeons to plan surgery on a computer workstation and then perform the surgery using these images; optical tracking systems comprising infrared cameras, light-emitting diodes and medical imaging software for determining the position of surgical instruments during medical operations; image production software; image management, review and diagnosis software; computer hardware, software, workstations, namely, computer workstations for medical, surgical and radiology imaging, and computer software to facilitate the development of medical imaging, surgical and radiology applications; computer system, comprising computer hardware and software used to assist surgeons, comprising a three-dimensional workstation with image data; computer graphics workstations comprising special-purpose computer graphics display hardware, operating software and special-purpose application software dedicated to the examination and analysis of medical imaging data which has been acquired from other imaging devices