Specifications

ManualsBrandsEpson ManualsComputer equipmentOS/2 Warp 3.0 and TWAIN

Appendix A Glossary

Energy Star A certification program started by

the Environmental Protection Agency. Energy

Star–certified computers and peripherals are

designed to draw less than 30 watts of electrical

energy from a standard 110-volt AC outlet during

periods of inactivity. Also called Green PCs. See also

E2000.

Enhanced CD (CD-E) See Blue Book.

enhanced graphics adapter See EGA.

enhanced small device interface See ESDI.

e-PCI-X The PICMG 1.2 embedded PCI-X specifi-

cation for passive backplane computers. See also

PICMG.

EPIC Short for Explicitly Parallel Instruction

Computing; the RISC-based 64-bit processor archi-

tecture used by the Intel Itanium and Itanium 2

processors. EPIC is not the same architecture as

AMD64 or EM64T. See also RISC.

EPP (enhanced parallel port) A type of paral-

lel port developed by Intel, Xircom, and Zenith

Data Systems that operates at almost ISA bus speed

and offers a tenfold increase in the raw throughput

capability over a conventional parallel port. EPP is

especially designed for parallel port peripherals,

such as LAN adapters, disk drives, and tape back-

ups. See also IEEE 1284.

EPROM (erasable programmable read-only

memory) A type of read-only memory (ROM) in

which the data pattern can be erased to allow a

new pattern. EPROM usually is erased by ultraviolet

light and recorded by a higher-than-normal voltage

programming signal.

equalization A compensation circuit designed

into modems to counteract certain distortions

introduced by the telephone channel. Two types

are used: fixed (compromise) equalizers and those

that adapt to channel conditions (adaptive). Good-

quality modems use adaptive equalization.

error control Various techniques that check the

reliability of characters (parity) or blocks of data.

V.42, MNP, and HST error-control protocols use

error detection (CRC) and retransmission of error

frames (ARQ).

error message A word or combination of words

to indicate to the user that an error has occurred

somewhere in the program.

ESCD (extended system configuration data)

An area in CMOS or flash/NVRAM where plug-and-

play information is stored.

ESDI (Enhanced Small Device Interface) A

hardware standard developed by Maxtor and stan-

dardized by a consortium of 22 disk drive manu-

facturers on January 26, 1983. A group of 27

manufacturers formed the ESDI steering committee

on September 15, 1986, to enhance and improve

the specification. A high-performance interface

used primarily with hard disks, ESDI enables a max-

imum data transfer rate to and from a hard disk of

between 10Mbps and 24Mbps. ESDI was replaced

by IDE and SCSI interfaces. ESDI drives use the

same 34-pin and 20-pin cables used by

ST412/ST506 drives.

Ethernet A type of network protocol developed

in the late 1970s by Bob Metcalf at Xerox

Corporation and endorsed by the IEEE. One of the

oldest LAN communications protocols in the per-

sonal computing industry, Ethernet networks use a

collision-detection protocol to manage contention.

Ethernet is defined by the IEEE 802.3 standard.