Users Guide

Glossary 225
peripheral device
An internal or external device—such as a printer, a disk drive, or a keyboard—
connected to a system.
physical memory array
The physical memory array is the entire physical memory of a system. Variables
for physical memory array include maximum size, total number of memory slots
on the motherboard, and total number of slots in use.
physical memory array mapped
The physical memory array mapped refers to the way physical memory is divided.
For example, one mapped area may have 640 KB and the other mapped area may
have between 1 MB and 127 MB.
pixel
A single point on a video display. Pixels are arranged in rows and columns to create
an image. A video resolution, such as 640 x 480, is expressed as the number of
pixels across by the number of pixels up and down.
Plug and Play
An industry-standard specification that makes it easier to add hardware devices
to personal computers. Plug and Play provides automatic installation and
configuration, compatibility with existing hardware, and dynamic support of
mobile computing environments.
power supply
An electrical system that converts AC current from the wall outlet into the DC
currents required by the system circuitry. The power supply in a personal
computer typically generates multiple voltages.
power unit
A set of power supplies in a system chassis.
ppm
Abbreviation for pages per minute.
PPP
Abbreviation for Point-to-Point Protocol.