9 ALTERNATIVE INPUT DEVICES, KEYBOARDS, COMPUTER KEYBOARDS, ENVIRONMENTAL CONTROL SYSTEMS, COMPUTER DATA ENTRY DEVICES, COMPUTER SOFTWARE, COMPUTER FIRMWARE, DIGITAL COMPUTER HARDWARE, ULTRASONIC HEADSETS, PHOTOSENSITIVE OPTICAL POINTERS, ABILITY SWITCHES SUITED FOR HANDICAPPED PEOPLE, JOY STICKS, PRODUCT MOUNTING HARDWARE, MICROPROCESSOR-BASED INDUSTRIAL CONTROLLERS, VIDEO TAPES, AUDIO TAPES, SPEECH RECOGNITION SYSTEMS, SPEECH SYNTHESIS SYSTEMS, COMPUTER CABLES AND REMOTE CONTROL PODS