Dell PowerEdge 4600 - Manual (Page 38)

Acronym for random-access memory. The system's primary temporary storage 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 system.
RAMDAC
Acronym for random-access memory digital-to-analog converter.
read-only file
A read-only file is one that you are prohibited from editing or deleting. A file can have read-only status if:
l Its read-only attribute is enabled.
l It resides on a physically write-protected diskette or on a diskette in a write-protected drive.
l It is located on a network in a directory to which the system administrator has assigned read-only rights to you.
readme file
A text file included with a software package or hardware product that contains information supplementing or updating the documentation for the software or
hardware. Typically, readme files provide installation information, describe new product enhancements or corrections that have not yet been documented, and
list known problems or other things you need to be aware of as you use the software or hardware.
real mode
An operating mode supported by 80286 or higher microprocessors, real mode imitates the architecture of an 8086 microprocessor.
refresh rate
The rate at which the monitor redraws the video image on the monitor screen. More precisely, the refresh rate is the frequency, measured in Hz, at which the
screen's horizontal lines are recharged (sometimes also referred to as its vertical frequency). The higher the refresh rate, the less video flicker can be seen by
the human eye. The higher refresh rates are also noninterlaced.
RFI
Abbreviation for radio frequency interference.
RGB
Abbreviation for red/green/blue.
ROM
Acronym for read-only memory. Your system contains some programs essential to its operation in ROM code. Unlike RAM, a ROM chip retains its contents even
after you turn off your system. Examples of code in ROM include the program that initiates your system's boot routine and the POST.
rpm
Abbreviation for revolutions per minute.
RTC
Abbreviation for real-time clock. Battery-powered clock circuitry inside the system that keeps the date and time after you turn off the system.
SCSI
Acronym for small computer system interface. An I/O bus interface with faster data transmission rates than standard ports. You can connect up to seven
devices (15 for some newer SCSI types) to one SCSI interface.
SDMS
Abbreviation for SCSI device management system.
SDRAM
Acronym for synchronous dynamic random-access memory.
sec
Abbreviation for second(s).
SEC
Abbreviation for single-edge contact.
serial port
An I/O port used most often to connect a modem to your system. You can usually identify a serial port on your system by its 9-pin connector.
service tag number
A bar code label on the system that identifies it when you call Dell for customer or technical support.