User's Manual

242 Glossary
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FILE LOCATI ON: S:\SYSTEMS\Pebble\UG\A00\English\glossary.fm
DELL CONFI DENTI AL – PRELI MI NARY 1/29/03 – FOR PROOF ONLY
H Z — 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
I C — Industry Canada — The Canadian regulatory body responsible for regulating
emissions from electronic equipment, much as the FCC does in the United States.
I C — 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.
I DE — integrated device electronics — An interface for mass storage devices in
which the controller is integrated into the hard drive or CD drive.
I EEE 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.
I NFRARED SENSOR — A port that allows you to transfer data between the
computer and infrared-compatible devices without using a cable connection.
I NTEGRATED — 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
microprocessor to communicate with that device.
I
RDA — Infrared Data Association — The organization that creates international
standards for infrared communications.
I RQ — interrupt request — An electronic pathway assigned to a specific device so
that the device can communicate with the microprocessor. Each device connection
must be assigned an IRQ. Alt hough t wo devices can share the same IRQ assignment,
you cannot operate both devices simultaneously.
I SP — Internet service provider — A company that allows you to access its host
server to connect directly to the Internet, send and receive e-mail, and access
websites. The ISP typically provides you with a software package, user name, and
access phone numbers for a fee.
K
K B — kilobit — A unit of data that equals 1024 bits. A measurement of the
capacity of memory integrated circuits.