Dell OptiPlex GX280 - Manual (Page 190)

RPM — revolutions per minute — The number of rotations that occur per minute. Hard drive speed is often measured in rpm.
RTC — real time clock — Battery-powered clock on the system board that keeps the date and time after you shut down the
computer.
RTCRST — real-time clock reset — A jumper on the system board of some computers that can often be used for
troubleshooting problems.
S
ScanDisk — A Microsoft utility that checks files, folders, and the hard disk's surface for errors. ScanDisk often runs when you
restart the computer after it has stopped responding.
SDRAM — synchronous dynamic random-access memory — A type of DRAM that is synchronized with the optimal clock speed
of the processor.
serial connector — An I/O port often used to connect devices such as a handheld digital device or digital camera to your
computer.
Service Tag — A bar code label on your computer that identifies your computer when you access Dell Support at
support.dell.com or when you call Dell for customer service or technical support.
setup program — A program that is used to install and configure hardware and software. The setup.exe or install.exe
program comes with most Windows software packages. Setup program differs from system setup.
shortcut — An icon that provides quick access to frequently used programs, files, folders, and drives. When you place a
shortcut on your Windows desktop and double-click the icon, you can open its corresponding folder or file without having to
find it first. Shortcut icons do not change the location of files. If you delete a shortcut, the original file is not affected. Also,
you can rename a shortcut icon.
shutdown — The process of closing windows and exiting programs, exiting the operating system, and turning off your
computer. You can lose data if you turn off your computer before completing a shutdown.
smart card — A card that is embedded with a processor and a memory chip. Smart cards can be used to authenticate a user
on computers equipped for smart cards.
software — Anything that can be stored electronically, such as computer files or programs.
S/PDIF — Sony/Philips Digital Interface — An audio transfer file format that allows the transfer of audio from one file to
another without converting it to and from an analog format, which could degrade the quality of the file.
standby mode — A power management mode that shuts down all unnecessary computer operations to save energy.
surge protectors — Prevent voltage spikes, such as those that may occur during an electrical storm, from entering the
computer through the electrical outlet. Surge protectors do not protect against lightning strikes or against brownouts, which
occur when the voltage drops more than 20 percent below the normal AC-line voltage level.
Network connections cannot be protected by surge protectors. Always disconnect the network cable from the network
connector during electrical storms.
SVGA — super-video graphics array — A video standard for video cards and controllers. Typical SVGA resolutions are 800 x
600 and 1024 x 768.
The number of colors and resolution that a program displays depends on the capabilities of the monitor, the video controller
and its drivers, and the amount of video memory installed in the computer.