9 Oscilloscopes; Computer-controlled apparatus for testing and measuring radio frequency signals, concentrations of gas and liquids, audio signals; Digital multimeters; Electronic test and measurement devices for use in the fields of networks and telecommunications, namely, instrumentation used to test and certify new and existing data and voice communication cable and coaxial cable; Electronic testing equipment, namely, telecommunication line integrity testing apparatus; Measuring instrumentation and apparatus, namely, digitizers; Radio-frequency power meters; Surveying apparatus