Digital multimeter; digital clamp meter for measuring voltage, resistance, current, dwell, engine revolutions per minute and temperature; digital and analogue automotive multimeter for measuring voltage, resistance, current, dwell, engine revolutions per minute and temperature; digital storage oscilloscope; electrical power quality tool testing machines, namely, electronic meters for testing electrical systems, current meters, voltmeters, power meters, resistance meters, power analyzers, power quality analyzers, power harmonics analyzers, and voltage event recorders; electrical process calibration tools, namely, calibration devices in the nature of documenting process calibrators, multifunction process calibrators, temperature calibrators, pressure calibrators, process meters, and loop calibrators used to calibrate electronic meters used as measuring and testing equipment; telecom test tools, namely, local and wide area network electronic meters for measuring electrical continuity; electronic cable mapping units in the nature of GPS tracking devices; digital troubleshooting systems comprised of computer hardware and software used to diagnose and analyze electronic devices and computer hardware in the nature of voltage testers, cable testers, cable analyzers for analyzing electrical resistance, cable identification modules for use with cable testers in the nature of electronic tone generators and probes, and loop testers; multi-function meter used to measure resistance, capacitance and inductance; logic analyzer of electrical cables; digital frequency counter, namely, frequency meters; function generator in the nature of computer hardware and downloadable software used to operate the aforementioned computer hardware; bicycle ergometer for measuring time, speed, distance, pulse rate and calories for non-medical uses; electronic thermometer, namely, industrial use digital thermometers; and environment tester, namely, hygrometer, anemometer, photometer, noise measuring apparatus, and radiation measuring apparatus