Power may refer to any of the following:
1. Electricity used by a computer or other electronic devices is often called power. In the United States, power coming from a standard wall socket is AC (alternating current), which is converted to DC (direct current) by the computer's power supply. The picture is a power warning sign, indicating the danger of electrocution.
2. When describing a computer in general, power describes the computer's capabilities, such as how fast it is. A computer's overall performance is often determined using benchmark software.
3. Command used with some versions of Windows on portable computers that lets you conserve energy. See the power command page for additional information.
4. Power is another name of an exponent.