Dell Latitude D820 Technical Manual page 105

CD-RW drive — A drive that can read CDs and write to CD-RW (rewritable CDs) and CD-R
(recordable CDs) discs. You can write to CD-RW discs multiple times, but you can write to CD-R discs
only once.
CD-RW/DVD drive — A drive, sometimes referred to as a combo drive, that can read CDs and DVDs
and write to CD-RW (rewritable CDs) and CD-R (recordable CDs) discs. You can write to CD-RW
discs multiple times, but you can write to CD-R discs only once.
clock speed — The speed, given in MHz, that indicates how fast computer components that are
connected to the system bus operate.
COA — Certificate of Authenticity — The Windows alpha-numeric code located on a sticker on your
computer. Also referred to as the Product Key or Product ID.
Control Panel — A Windows utility that allows you to modify operating system and hardware settings,
such as display settings.
controller — A chip that controls the transfer of data between the processor and memory or between
the processor and devices.
CRIMM — continuity rambus in-line memory module — A special module that has no memory chips
and is used to fill unused RIMM slots.
cursor — The marker on a display or screen that shows where the next keyboard, touch pad, or
mouse action will occur. It often is a blinking solid line, an underline character, or a small arrow.
D
DDR SDRAM — double-data-rate SDRAM — A type of SDRAM that doubles the data burst cycle,
improving system performance.
DDR2 SDRAM — double-data-rate 2 SDRAM — A type of DDR SDRAM that uses a 4-bit prefetch
and other architectural changes to boost memory speed to over 400 MHz.
device — Hardware such as a disk drive, printer, or keyboard that is installed in or connected to your
computer.
device driver — See driver.
DIN connector — A round, six-pin connector that conforms to DIN (Deutsche Industrie-Norm)
standards; it is typically used to connect PS/2 keyboard or mouse cable connectors.
disk striping — A technique for spreading data over multiple disk drives. Disk striping can speed up
operations that retrieve data from disk storage. Computers that use disk striping generally allow the
user to select the data unit size or stripe width.
DMA — direct memory access — A channel that allows certain types of data transfer between RAM
and a device to bypass the processor.
docking device — See APR.
DMTF — Distributed Management Task Force — A consortium of hardware and software companies
who develop management standards for distributed desktop, network, enterprise, and Internet
environments.