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Glossary 191
GHz — gigahertz — A measurement of frequency that equals one thousand million
Hz, or one thousand MHz. The speeds for computer processors, buses, and interfaces
are often measured in GHz.
graphics mode — A video mode that can be defined as x horizontal pixels by y vertical
pixels by z colors. Graphics modes can display an unlimited variety of shapes and
fonts.
GUI — graphical user interface — Software that interacts with the user by means of
menus, windows, and icons. Most programs that operate on the Windows operating
systems are GUIs.
H
hard drive — A drive that reads and writes data on a hard disk. The terms hard drive
and hard disk are often used interchangeably.
heat sink — A metal plate on some processors that helps dissipate heat.
hibernate mode — A power management mode that saves everything in memory to a
reserved space on the hard drive and then turns off the computer. When you restart
the computer, the memory information that was saved to the hard drive is
automatically restored.
HTTP — hypertext transfer protocol — A protocol for exchanging files between
computers connected to the Internet.
Hyper-Threading — Hyper-Threading is an Intel technology that can enhance overall
computer performance by allowing one physical processor to function as two logical
processors, capable of performing certain tasks simultaneously.
Hz — hertz — A unit of frequency measurement that equals 1 cycle per second.
Computers and electronic devices are often measured in kilohertz (kHz), megahertz
(MHz), gigahertz (GHz), or terahertz (THz).
I
iAMT — Intel
®
Active Management Technology — Delivers more secure systems
management capabilities, regardless of whether the computer is turned on or off, or
the operating system is not responding.
IC — integrated circuit — A semiconductor wafer, or chip, on which thousands or
millions of tiny electronic components are fabricated for use in computer, audio, and
video equipment.
IDE — integrated device electronics — An interface for mass storage devices in which
the controller is integrated into the hard drive or CD drive.
book.book Page 191 Friday, October 19, 2007 2:03 PM