Dell Latitude D820 Technical Manual page 113

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.
Strike Zone™ — Reinforced area of the platform base that protects the hard drive by acting as a
dampening device when a computer experiences resonating shock or is dropped (whether the
computer is on or off).
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