Dell PowerEdge 750 - Manual (Page 30)

peripheral
An internal or external device, such as a diskette drive or keyboard, connected to a system
PGA
Pin grid array; a type of processor socket that allows you to remove the processor chip
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.
POST
Power-on self-test. Before the operating system loads when you turn on your system, the POST tests various system components such as RAM and hard
drives.
processor
The primary computational chip inside the system that controls the interpretation and execution of arithmetic and logic functions. Software written for one
processor must usually be revised to run on another processor. CPU is a synonym for processor.
PS/2
Personal System/2
PXE
Preboot eXecution Environment; a way of booting a system via a LAN (without a hard drive or bootable diskette)
RAC
Remote access controller
RAID
Redundant array of independent disks; a method of providing data redundancy. Some common implementations of RAID include RAID 0, RAID 1, RAID 5,
RAID 10, and RAID 50. See also guarding, mirroring, and striping.
RAM
Random-access memory. The system's primary temporary storage area for program instructions and data. Any information stored in RAM is lost when you
turn off your system.
RAS
Remote Access Service. This service allows users running the Windows operating system to remotely access a network from their system using a modem.
readme file
A text file, usually shipped with software or hardware, that contains information supplementing or updating the product's documentation.
read-only file
A read-only file is one that you are prohibited from editing or deleting.
ROM
Read-only memory. Your system contains some programs essential to its operation in ROM code. A ROM chip retains its contents even after you turn off your
system. Examples of code in ROM include the program that initiates your system's boot routine and the POST.