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Glossary 181
L1 cache — Primary cache stored inside the processor.
L2 cache — Secondary cache which can either be external to the processor or
incorporated into the processor architecture.
carnet — An international customs document that facilitates temporary imports into
foreign countries. Also known as a merchandise passport.
CD-R — CD recordable — A recordable version of a CD. Data can be recorded only
once onto a CD-R. Once recorded, the data cannot be erased or written over.
CD-RW — CD rewritable — A rewritable version of a CD. Data can be written to a
CD-RW disc, and then erased and written over (rewritten).
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.
CMOS — A type of electronic circuit. Computers use a small amount of battery-
powered CMOS memory to hold date, time, and system setup options.
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.
Consumer IR— A port on the front of the computer that allows certain software
applications to be controlled by the Dell Travel Remote in some systems. In other
systems, this port allows you to transfer data between the computer and infrared-
compatible devices without using a cable connection.
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.
book.book Page 181 Friday, November 30, 2007 11:28 AM