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Glossary 209
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.
modem — A device that allows your computer to communicate with other computers
over analog telephone lines. Three types of modems include: external, PC Card, and
internal. You typically use your modem to connect to the Internet and exchange e-mail.
module bay — See media bay.
MP — megapixel — A measure of image resolution used for digital cameras.
ms — millisecond — A measure of time that equals one thousandth of a second.
Access times of storage devices are often measured in ms.
book.book Page 209 Monday, October 6, 2008 11:38 AM