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Glossary 167
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.
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.
integrated — Usually refers to components that are physically located on the
computer’s system board. Also referred to as built-in.
I/O — input/output — An operation or device that enters and extracts data from your
computer. Keyboards and printers are I/O devices.
I/O address — An address in RAM that is associated with a specific device (such as a
serial connector, parallel connector, or expansion slot) and allows the processor to
communicate with that device.
IrDA — Infrared Data Association — The organization that creates international
standards for infrared communications.
IRQ — interrupt request — An electronic pathway assigned to a specific device so
that the device can communicate with the processor. Each device connection must be
assigned an IRQ. Although two devices can share the same IRQ assignment, you