OPERATIONAL AMPLIFIERS, POWER SUPPLIES, ACTIVE FILTERS, CONVERTERS INCLUDING ANALOG-TO-DIGITAL AND DIGITAL-TO-ANALOG, INSTRUMENTATION AND ISOLATION AMPLIFIERS, ANALOG COMPUTATIONAL CIRCUITS, VOLTAGE REFERENCES, TRANSDUCERS, SAMPLE/TRACK-HOLD AMPLIFIERS, DATA-ACQUISITION MODULES, SWITCHES, MULTIPLEXERS, MONOLITHIC CHIPS, LINEAR IC TESTERS, ANALOG MULTIPLIERS/DIVIDERS, LOG-ANTILOG AMPLIFIERS, SIGNAL CONDITIONERS, DIGITAL PANEL METERS, MICROCOMPUTER I/O SUBSYSTEMS COMPRISING INPUT/OUTPUT BOARDS, MEASUREMENT AND CONTROL SYSTEMS, COMPRISING SIGNAL CONDITIONERS, SIGNAL ISOLATORS AND CONVERTERS, COMPUTER PROGRAMS FOR ELECTRONIC DATA PROCESSORS FOR COMPUTER BASED MEASUREMENT OF SIGNALS, COMPUTER PROGRAMS FOR ELECTRONIC DATA PROCESSORS FOR COMPUTER BASED MEASUREMENT AND DISPLAY OF INPUT SIGNALS AND COMPUTER PROGRAMS FOR ELECTRONIC DATA PROCESSORS FOR COMPUTER BASED MEASUREMENT OF INPUT SIGNALS AND GENERATION OF OUTPUT SIGNALS IN RESPONSE TO MEASURED INPUT SIGNALS FOR CONTROL THEREOF; COMPUTER PROGRAMS FOR VISUAL INSPECTION OF ASSEMBLY AND PRODUCTION LINES, QUALITY CONTROL FOR PRODUCTION AND ASSEMBLY LINES, ROBOT GUIDANCE OF ASSEMBLY OPERATIONS, INVENTORY CONTROL, DIGITAL THERMOMETERS, COMPUTER INTERFACE PRODUCTS (NAMELY, REAL-TIME INTERFACE AND DATA EXCHANGERS, SERIAL TRANSMITTAL CARD/MODULES, SERIAL RECEIVER CARD/MODULES AND SERIAL MULTIPLIER CAR