Dell 320 Computer Hardware User Manual


 
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.
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 cannot operate both devices simultaneously.
ISP 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
Kb kilobit A unit of data that equals 1024 bits. A measurement of the capacity of memory integrated circuits.
KB kilobyte A unit of data that equals 1024 bytes but is often referred to as 1000 bytes.
key combination A command requiring you to press multiple keys at the same time.
kHz kilohertz A measurement of frequency that equals 1000 Hz.
L
LAN local area network A computer network covering a small area. A LAN usually is confined to a building or a few nearby buildings. A LAN can be
connected to another LAN over any distance through telephone lines and radio waves to form a wide area network (WAN).
LCD liquid crystal display The technology used by portable computer and flat-panel displays.
LED light-emitting diode An electronic component that emits light to indicate the status of the computer.
local bus A data bus that provides a fast throughput for devices to the processor.
LPT line print terminal The designation for a parallel connection to a printer or other parallel device.
M
Mb megabit A measurement of memory chip capacity that equals 1024 Kb.
Mbps megabits per second One million bits per second. This measurement is typically used for transmission speeds for networks and modems.
MB megabyte Ameasurementofdatastoragethatequals1,048,576bytes.1MBequals1024KB.Whenusedtorefertoharddrivestorage,thetermis
often rounded to 1,000,000 bytes.
MB/sec megabytes per second One million bytes per second. This measurement is typically used for data transfer ratings.
media bay Abaythatsupportsdevicessuchasopticaldrives,asecondbattery,oraDellTravelLite™module.
memory A temporary data storage area inside your computer. Because the data in memory is not permanent, it is recommended that you frequently save
your files while you are working on them, and always save your files before you shut down the computer. Your computer can contain several different forms of
memory, such as RAM, ROM, and video memory. Frequently, the word memory is used as a synonym for RAM.
memory address A specific location where data is temporarily stored in RAM.
memory mapping The process by which the computer assigns memory addresses to physical locations at start-up. Devices and software can then identify
information that the processor can access.