Dell PowerEdge 750 - Manual (Page 24)

conventional memory
The first 640 KB of RAM. Conventional memory is found in all systems. Unless they are specially designed, MS-DOS® programs are limited to running in
conventional memory.
coprocessor
A chip that relieves the system's processor of specific processing tasks. A math coprocessor, for example, handles numeric processing.
DC
Direct current
DDR
Double-data rate; a technology in memory modules that potentially doubles the output
device driver
A program that allows the operating system or some other program to interface correctly with a peripheral. Some device drivers—such as network drivers—
must be loaded from the config.sys file or as memory-resident programs (usually, from the autoexec.bat file). Others must load when you start the program
for which they were designed.
DHCP
Dynamic Host Configuration Protocol; a method of automatically assigning an IP address to a client system
diagnostics
A comprehensive set of tests for your system
DIMM
Dual in-line memory module. See also memory module.
DIN
Deutsche Industrie Norm
directory
Directories help keep related files organized on a disk in a hierarchical, "inverted tree" structure. Each disk has a "root" directory. Additional directories that
branch off the root directory are called subdirectories. Subdirectories may contain additional directories branching off them.
DMA
Direct memory access. A DMA channel allows certain types of data transfer between RAM and a device to bypass the processor.
DMI
Desktop Management Interface. DMI enables the management of your system's software and hardware by collecting information about the system's
components, such as the operating system, memory, peripherals, expansion cards, and asset tag.
DNS
Domain Name System; a method of translating Internet domain names, such as www.dell.com, into IP addresses, such as 143.166.83.200
DRAM
Dynamic random-access memory. A system's RAM is usually made up entirely of DRAM chips.