Electronic circuitry.
A device or devices which require the flow of electrons through conductors and semiconductors in order to perform their function; devices that operate on electrical power (battery or outlet)
The study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles or by converting the flow of charged particles to or from other forms of energy.
That part of a piece of electronic apparatus that provides appropriate voltages for the rest of the electronics from the connected AC source.
A source of power such as the mains or a generator.
Used other than figuratively or idiomatically: see power, supply.