HP Compaq Presario,Presario 7480 Reference Manual page 108

gigabyte (GB)
A unit of measurement used to describe data quantity. One GB is equal to
approximately one billion bytes. See byte.
graphical user
The collection of images and text shown on the monitor display that facilitates the
interface (GUI)
entry of commands and data. The Windows desktop is a graphical user interface.
GUI
See graphical user interface.
half duplex
Describes a communication channel that is only open in a single direction at any
given time. In telecommunications, it refers to the ability of only one party to
transmit data at any given time. Compare duplex.
hard disk
An internal data storage device made of hard aluminum disks coated with iron oxide.
hard drive
A device that enables a computer to read data from and write data to a hard disk.
hardware
The physical components of a computer.
hertz (Hz)
A unit of measurement used to describe frequency rate. One hertz is equal to one
cycle per second. See megahertz, microprocessor, refresh rate.
hibernation
Applies to notebook computers only. A state of decreased power consumption. When
the notebook computer enters this state, the contents of the memory are automatically
written to the hard disk for safe storage. Your notebook computer automatically
enters hibernation if any of the following events occur:
high-
A liquid crystal display technology that provides high quality realism, especially
performance
when viewing video or playing 3D games.
addressing
(HPA)
hotplug
To connect or disconnect equipment, such as a PC card or USB device, without
restarting the computer.
hover help
The information that may be displayed when the mouse pointer is placed on an icon,
button, or toolbar item, such as the name of the button or an explanation of the button
function.
Glossary
The notebook computer has been in the Sleep mode for more than one hour
(while connected to battery power only).
The battery reaches the low charge state.
The power button is pressed briefly while the computer is on.
Glossary-7