Glossary
203
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
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.
Summary of Contents for Inspiron 1521
Page 1: ...w w w d e l l c o m s u p p o r t d e l l c o m Dell Inspiron 1521 Owner s Manual Model PP22L ...
Page 18: ...18 Finding Information ...
Page 32: ...32 About Your Computer ...
Page 46: ...46 Using the Keyboard and Touchpad ...
Page 54: ...54 Using a Battery ...
Page 82: ...82 Using ExpressCards ...
Page 86: ...86 Using the Memory Card Reader ...
Page 100: ...100 Securing Your Computer ...
Page 161: ...Adding and Replacing Parts 161 1 captive screws 2 2 cover 1 2 ...
Page 168: ...168 Adding and Replacing Parts ...
Page 170: ...170 Dell QuickSet Features ...
Page 180: ...180 Getting Help ...
Page 214: ...214 Glossary ...
Page 222: ...222 Index ...