Oscilloscopes; Digital multimeters; LCR meters, namely, inductance, capacitance and resistance meters; Function generators for use in the field of signal generation, namely, generators used to generate functional signals; Electrical power supplies; Test and measuring instruments, namely, analog oscilloscopes and digital oscilloscopes, spectrum analyzers, AM/FM and audio signal generators, synthesized and function generators, digital multimeters, programmable and regulated direct current power supplies, programmable electronic loads, ground continuity testers, withstanding voltage and insulation testers, high frequency noise simulators, lighting surge generators, inductor capacitor resistor digibridges, passive components standards, and alternating current power supplies; Automatic test equipment, namely, in-circuit testers, auto-loading in-circuit testers, and in-line type in-circuit testers; and Environmental test equipment, namely, temperature and humidity chambers, walk-in chambers, thermal shock test chambers, and vibration testers