Dell Latitude C640 - Manual (Page 159)

A metric unit of measure equal to 0.39 inch.
cm/sec - centimeters per second
Control Panel - A utility that allows you to modify operating system and hardware settings, such as
display settings.
controller - Chips that control the transfer of data between the microprocessor and memory or between
the microprocessor and devices.
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 can theoretically improve memory clock speed to at least 200 MHz.
device - Hardware such as a disk drive, printer, or keyboard that is installed in or connected to your
computer.
device driver - See driver.
DMA - direct memory access
A channel that allows certain types of data transfer between RAM and a device to bypass the microprocessor.
docking device - See APR.
DRAM - dynamic random-access memory
Memory that stores information in integrated circuits containing capacitors.
driver - Software that allows the operating system to control a device such as a printer. Many devices will
not work properly if the correct driver is not installed in the computer.
dual display mode - A display setting that allows you to use a second monitor as an extension of your
display. Also referred to as extended display mode.
DVD - digital versatile disc
A disc usually used to store movies. DVDs are double-sided, whereas CDs are single-sided. DVD drives read