High technology business use including offices, display areas, and sales areas for the design, research, engineering and assembly of computer-based equipment and systems, provided that such use or uses result in no objectionable dust, fumes, noise, odors, smoke, glare and vibration, and further provided that neither industrial uses nor outside storage shall be permitted. In addition, for every building devoted to this use, no more than 50% of the building shall be utilized for assembly.