User's Manual

ManualsBrandsEpson ManualsData Input DevicesEndeavor VL

Numeric

keypad

The

number

and

cursor

control

keys

grouped

together

on

the

right

side

of

the

keyboard.

The

operation

of

the

dual-use

keys

on

the

numeric

keypad

is

controlled

by

the

Num

Lock

key.

Operating

speed

The

speed

at

which

the

computer’s

processor

can

execute

commands,

usually

expressed

in

megahertz

(MHz).

See

also

Megahertz.

Operating

system

A

collection

of

programs

that

manage

a

computer’s

operations,

such

as

interpreting

input,

managing

files,

and

reading

and

writing

data

to

disk.

The

operating

system

(such

as

MS-DOS,

OS/

2,

or

UNIX)

provides

the

foundation

for

the

other

programs

and

controls

hardware

resources.

Option

card

A

circuit

board

you

can

install

inside

the

computer

to

provide

additional

capabilities,

such

as a

modem

or

an

additional

I/O

port.

Option

cards

plug

directly

into

option

slots

so

you

do

not

have

to

alter

a

computer’s

circuitry

to

enhance

your

system.

OS/2

Operating

System/

2.

The

operating

system

developed

jointly

by

Microsoft

and

IBM

that

provides

protected

mode

processing

and

multitasking

capabilities.

See

also

DOS,

MS-DOS,

and

Operating system.

Parallel

An

interface

that

transmits

data

simultaneously

over

separate

wires

in

a

cable.

See

also

Interface

and

Serial.

Glossary

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