Dell PowerEdge 1400, User Manual

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support.dell.com Glossary 13
'(
Acronym for random-access memory.
The computer's primary temporary stor-
age area for program instructions and
data. Each location in RAM is identified by
a number called a memory address. Any
information stored in RAM is lost when
you turn off your computer.
'(
Acronym for random-access memory dig-
ital-to-analog converter.
'
Acronym for Resource Configuration
Add-in.
'#
Acronym for Resource Configuration
Utility.
%
A read-only file is one that you are prohib-
ited from editing or deleting. A file can
have read-only status if: Its read-only at-
tribute is enabled. It resides on a
physically write-protected diskette.
It is located on a network in a directory to
which the system administrator has as-
signed read-only rights to you.
An operating mode supported by 80286
or higher microprocessors, real mode im-
itates the architecture of an 8086
microprocessor. Designed to run in real
mode, MS-DOS (unassisted by additional
software techniques) can address only
640 KB of conventional memory.
The frequency, measured in Hz, at which
the screen's horizontal lines are re-
charged. A monitor's refresh rate is also
referred to as its vertical frequency.
',
Abbreviation for ringer equivalence
number.
'&
Abbreviation for radio frequency
interference.
')
Abbreviation for red/green/blue.
' (
Acronym for read-only memory. Your
computer contains some programs es-
sential to its operation in ROM code.
Unlike RAM, a ROM chip retains its con-
tents even after you turn off your
computer. Examples of code in ROM in-
clude the program that initiates your
computer's boot routine and the POST.
Abbreviation for revolutions per minute.
'"
Abbreviation for real-time clock. Battery-
powered clock circuitry inside the
computer that keeps the date and time
after you turn off the computer.
Acronym for small computer system in-
terface. An I/O bus interface with faster
data transmission rates than standard
ports. You can connect up to seven devic-
es to one SCSI interface.
(
Abbreviation for SCSI device manage-
ment system.
'(
Abbreviation for synchronous dynamic
random-access memory.
Abbreviation for scalable disk system.
,
Abbreviation for single-edge contact.
Abbreviation for second(s).
The fundamental unit of data access for a
hard-disk drive. For PC-compatible sys-
tems, a sector is usually 512 bytes. See
also block and block size.
An I/O port used most often to connect a
modem or a mouse to your computer. You