Dell 2100/180, 2100/200 - page 158

158 Dell PowerEdge 2100/180 and 2100/200 Systems User’s Guide
LN
Abbreviation for load number.
local bus
On a computer with local-bus expansion capability, certain
peripheral devices (such as the video adapter circuitry) can
be designed to run much faster than they would with a
traditional expansion bus. Some local-bus designs allow
peripherals to run at the same speed and with the same
width data path as the computer’s microprocessor.
LPTn
The MS-DOS device names for the first through third par-
allel printer ports on your computer are LPT1, LPT2, and
LPT3.
LUN
Acronym for logical unit number.
m
Abbreviation for meter(s).
mA
Abbreviation for milliampere(s).
mAh
Abbreviation for milliampere-hour(s).
math coprocessor
See coprocessor.
MB
Abbreviation for megabyte(s). The term megabyte means
1,048,576 bytes; however, when referring to hard-disk drive
storage, the term is often rounded to mean 1,000,000 bytes.
MBR
Abbreviation for master boot record.
MDA
Abbreviation for monochrome display adapter.
memory
A computer can contain several different forms of memo-
ry, such as RAM, ROM, and video memory. Frequently,
the word memory is used as a synonym for RAM; for example,
an unqualified statement such as “…a computer with 8 MB of
memory” refers to a computer with 8 MB of RAM.
memory address
A specific location, usually expressed as a hexadecimal
number, in the computer’s RAM.
memory manager
A utility that controls the implementation of memory in
addition to conventional memory, such as extended or ex-
panded memory. See also conventional memory, EMM,
expanded memory, extended memory, HMA, upper mem-
ory area, and XMM.
MGA
Abbreviation for monochrome graphics adapter.
MHz
Abbreviation for megahertz.
microprocessor
Because it is the primary computational chip inside the
computer, it is customary to refer to the microprocessor as
“the computer’s brain.” The microprocessor contains an
arithmetic processing unit and a control unit. Software
written for one microprocessor must usually be revised to
run on another microprocessor. CPU is a synonym for
microprocessor.
min
Abbreviation for minute(s).
mm
Abbreviation for millimeter(s).
mouse
A pointing device that controls the movement of the cursor
on a screen. Mouse-aware software allows you to activate
commands by clicking a mouse button while pointing at
objects displayed on the screen.
ms
Abbreviation for millisecond(s).
MS-DOS
Abbreviation for Microsoft Disk Operating System.
MTBF
Abbreviation for mean time between failures.