Compatibility Guide

168 Glossary
PCI
Abbreviation for Peripheral Component Interconnect. The predominant 32-bit
or 64-bit local-bus standard developed by Intel Corporation.
PCMCIA
Personal Computer Memory Card International Association. An international
trade association that has developed standards for devices, such as modems and
external hard drives, that can be plugged into portable computers.
PERC
Acronym for PowerEdge Expandable RAID controller.
peripheral device
An internal or external device—such as a printer, a disk drive, or a keyboard—
connected to a system.
PGA
Abbreviation for pin grid array, a type of microprocessor socket that allows you to
remove the microprocessor chip.
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.
PIC
Acronym for programmable interrupt controller.
PIP
Acronym for peripheral interchange program.
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.