Electrical and electronic measuring and testing products, namely, AC power sources being power supplies, frequency converters, AC power supplies, DC power supplies, DC power sources being power supplies, DC electronic load measurers and testers in the nature of digital or analog multimeters, AC Electronic load measurers and testers in the nature of digital or analog multimeters, AC source measurers and testers in the nature of clamp meters for measuring electricity, DC source measurers and testers in the nature of clamp meters for measuring electricity, electric power converters and variable transformers, and accessories therefor including interface cards for data processing equipment in the form of printed circuits, mounting racks for power supplies and electrical and electronic hardware, input power cables, electrical terminal block shorting bars, plug adaptors, linking cards for use with electrical and electronic hardware, electrical and electronic linking cables, and transient voltage surge suppression kits; video recordings featuring information about electrical and electronic measuring and testing products; and downloadable software for power source control and data capture