Jumper

A small movable plug that connects two pins on a device’s circuit board. Jumpers alter the operation of a particular function.

LBA

Logical Block Address. A method of accessing large-capacity hard disk drives.

Local bus

An internal bus that controls the connections from the processor to the VGA and IDE interfaces. Local bus provides increased performance and speed.

Math coprocessor

A device that enables the computer to process mathematical calculations faster by using floating point numbers instead of whole numbers for calculations.

Memory module

A small circuit board, commonly called a SIMM (single inline memory module), that contains surface-mounted memory chips. You can add memory modules to the main system board to expand your computer’s memory.

Modem

Modulator/ DEModulator. A device that allows a computer to transfer data to and from another computer by transmitting signals over telephone lines.

G l o s s a r y 5