| A | B |
|---|
| AC | Current that is constantly changing directions at some frequency. |
| Amps | The measurement of current flowing in a circuit. |
| Capacitor | Electrical component that holds a charge. |
| Conductor | A material that allows electrons to move. |
| Current | Electrons flowing in a circuit. |
| DC | Current that flows in one direction. |
| Diode | A device that only allows current to flow in one direction. |
| Heat Dissipation | Taking heat away or diverting it; the job of the heat sink and fan on the CPU. |
| Insulator | A material that does not allow electrons to move. |
| P1 Connector | The power connector on an ATX power supply having 20 pins on a single keyed connector. |
| P8 and P9 Connectors | The power connectors on an AT power supply; connect beside each other with the black wires together in the middle. |
| Power Supply | The hardwae component that converts AC to DC; has connectors to power the motherboard, fans, disk drives and certain other hardware components. |
| Voltage selector switch | Manual switch on lthe back of the power supply to choose between 120 or 240 volts. |
| Wattage | The power rating of a power supply. |
| Watts | The measurement of power; equal to voltage times current. |
