Refers to an abnormal flow of current that is due to an improperly grounded electrical outlet.

Enables the unit to plug into a wall outlet without a power cord. Styles and features vary for wall tap plugs.

A watt is a unit of measure for true power consumption. One watt is one ampere of electrical current flowing at one volt.

A graphical representation of a signal in the form of a wave that displays how alternating current (AC) varies over time. Common waveform representations include sine wave, square wave, and trapezoidal wave. An electronic instrument called an oscilloscope is used to measure a waveform on a display screen.

Contains Microsoft Gadgets which display information or control external applications. Only available on Windows Vista.