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Glossary 183
DVD-R — DVD recordable — A recordable version of a DVD. Data can be recorded
only once onto a DVD-R. Once recorded, the data cannot be erased or written over.
DVD+RW — DVD rewritable — A rewritable version of a DVD. Data can be written
to a DVD+RW disc, and then erased and written over (rewritten). (DVD+RW
technology is different from DVD-RW technology.)
DVD+RW drive — drive that can read DVDs and most CD media and write to
DVD+RW (rewritable DVDs) discs.
DVI — digital video interface — A standard for digital transmission between a
computer and a digital video display.
E
ECC — error checking and correction — A type of memory that includes special
circuitry for testing the accuracy of data as it passes in and out of memory.
ECP — extended capabilities port — A parallel connector design that provides
improved bidirectional data transmission. Similar to EPP, ECP uses direct memory
access to transfer data and often improves performance.
EIDE — enhanced integrated device electronics — An improved version of the IDE
interface for hard drives and CD drives.
EMI — electromagnetic interference — Electrical interference caused by
electromagnetic radiation.
ENERGY STAR
®
— Environmental Protection Agency requirements that decrease
the overall consumption of electricity.
EPP — enhanced parallel port — A parallel connector design that provides
bidirectional data transmission.
ESD — electrostatic discharge — A rapid discharge of static electricity. ESD can
damage integrated circuits found in computer and communications equipment.
expansion card — A circuit board that installs in an expansion slot on the system
board in some computers, expanding the capabilities of the computer. Examples
include video, modem, and sound cards.
expansion slot — A connector on the system board (in some computers) where you
insert an expansion card, connecting it to the system bus.
ExpressCard — A removable I/O card adhering to the PCMCIA standard. Modems
and network adapters are common types of ExpressCards. ExpressCards support both
the PCI Express and USB 2.0 standard.