Dell Precision NT499, User Manual

Page: 273 / 290

Glossary
273
Glossary
Terms in this Glossary are provided for informational purposes only and may
or may not describe features included with your particular computer.
A
AC — alternating current — The form of electricity that powers your computer when
you plug the AC adapter power cable in to an electrical outlet.
ACPI — advanced configuration and power interface — A power management
specification that enables Microsoft
®
Windows
®
operating systems to put a computer
in standby or hibernate mode to conserve the amount of electrical power allocated to
each device attached to the computer.
AGP — accelerated graphics port — A dedicated graphics port that allows system
memory to be used for video-related tasks. AGP delivers a smooth, true-color video
image because of the faster interface between the video circuitry and the computer
memory.
AHCI — Advanced Host Controller Interface — An interface for a SATA hard drive
Host Controller which allows the storage driver to enable technologies such as Native
Command Queuing (NCQ) and hot plug.
ALS — ambient light sensor — A feature that helps to control display brightness.
antivirus software — A program designed to identify, quarantine, and/or delete viruses
from your computer.
ASF — alert standards format — A standard to define a mechanism for reporting
hardware and software alerts to a management console. ASF is designed to be
platform- and operating system-independent.
B
battery life span — The length of time (years) during which a portable computer
battery is able to be depleted and recharged.
battery operating time — The length of time (minutes or hours) that a portable
computer battery powers the computer.
BIOS — basic input/output system — A program (or utility) that serves as an
interface between the computer hardware and the operating system. Unless you
understand what effect these settings have on the computer, do not change them. Also
referred to as
System Setup .