SCIENTIFIC AND ELECTRICAL APPARATUS AND INSTRUMENTS, NAMELY, TESTERS, METERS, AND PROCESSORS FOR MEASUREMENT, RECORDING, REGULATION AND CONTROL OF PROCESS AND ELECTRICAL PARAMETERS IN THE NATURE OF HUMIDITY, PRESSURE, FLOW, PH, TILT, RADIATION, SPEED, FORCE, LEVEL, GAS VELOCITY, AMPERAGE, VOLTAGE, FREQUENCY, VIBRATION, RESISTANCE, CONDUCTIVITY; COMPUTER SOFTWARE FOR RETRIEVING, STORING, AND DISPLAYING SCIENTIFIC AND ENGINEERING DATA