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Glossary 205
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.
Mobile Broadband network — (also known as a WWAN) is a series of interconnected
computers that communicate with each other through wireless cellular technology and
provides Internet access in the same varied locations from which cellular telephone
service is available. Your computer can maintain the Mobile Broadband network
connection regardless of its physical location, as long as the computer remains in the
service area of your cellular service provider.