DATA PROCESSORS; COMPUTER HARDWARE; COMPUTER OPERATING PROGRAMS FOR ADJUSTING AND POSITIONING APPARATUS; ELECTRONIC DISTANCE SENSORS FOR MECHANICAL POSITIONING APPARATUS; ENCAPSULATED AND NON-ENCAPSULATED, PIEZOELECTRIC VALVE ACTUATORS; PIEZOELECTRIC ULTRASOUND CONVERTERS; MULTI-MODE COMPUTER NETWORK SWITCHES FOR OPTICAL WAVE GUIDES; PRECISE, MICRO-POSITIONING SCIENTIFIC DEVICES FOR USE IN AUTOMATION, FIBER OPTIC, LASER, SCANNING AND TOOL-MAKING APPLICATIONS