Ключевые слова: ampere, amplitude, analytics, apparatus, appliance, button, buttons, communication, component, connector, contraption, controller, device, dial, display, electrical, electronics, element, energy, equipment, factory, force, gadget, hand, historical, indicator, instrument, invention, key, machine, magnitude, measuring, mechanic, mechanism, old, power, powered, radio, scale, scientific, signal, soviet, switch, technical, technology, tool, transistor, transmitter, volt,