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Glossary 187
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.
memory module — A small circuit board containing memory chips, which connects to
the system board.
MHz — megahertz — A measure of frequency that equals 1 million cycles per second.
The speeds for computer processors, buses, and interfaces are often measured in MHz.
Mini PCI — A standard for integrated peripheral devices with an emphasis on
communications such as modems and NICs. A Mini PCI card is a small external card
that is functionally equivalent to a standard PCI expansion card.
Mini Card — A small card designed for integrated peripherals, such as
communication NICs. The Mini Card is functionally equivalent to a standard PCI
expansion card.
book.book Page 187 Friday, November 30, 2007 11:28 AM