User's Guide

GHz — gigahertz — A measurement of frequency that equals one thousand million Hz, or one thousand MHz.

The speeds for computer microprocessors, 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.

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 microprocessors that helps dissipate heat.

help file — A file that contains descriptive or instructional information about a product. Some help files are

associated with a particular program, such as Help in Microsoft Word. Other help files function as stand-alone

reference sources. Help files typically have a filename extension of .hlp or .chm.

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.

HTML — hypertext markup language — A set of codes inserted into an Internet web page intended for display

on an Internet browser.

HTTP — hypertext transfer protocol — A protocol for exchanging files between computers connected to the

Internet.

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).

IC — Industry Canada — The Canadian regulatory body responsible for regulating emissions from electronic

equipment, much as the FCC does in the United States.

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.

IEEE 1394 — Institute of Electrical and Electronics Engineers, Inc. — A high-performance serial bus used to

connect IEEE 1394-compatible devices, such as digital cameras and DVD players, to the computer.

infrared sensor — A port that allows you to transfer data between the computer and infrared-compatible

devices without using a cable connection.

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