9 LINKING APPARATUS FOR INTERCONNECTING PERSONAL COMPUTERS WITH PERIPHERALS, KEYBOARDS, VIDEO DISPLAY MONITORS AND MICE; SWITCHES, REMOTE CONTROL APPARATUS, SPLITTERS AND TELEPHONE-ACTIVATED POWER SWITCHES, EXCEPT FOR PRODUCTS ESPECIALLY ADAPTED, MODIFIED, OR DEVELOPED FOR USE IN, OR IN CONJUNCTION WITH, SPORTS MEDICINE, PHYSICAL REHABILITATION AND TESTING, EXERCISE OR FITNESS EQUIPMENT, AND EQUIPMENT SYSTEMS