Glossary 3
H
hard disk
A rigid magnetic storage device that provides fast access to stored data.
hardware
The electrical and mechanical parts from which a computer is made.
hertz
(Hz) A unit of frequency equal to one cycle per second.
hot key
Combination of two or three keys (such as Ctrl-Alt-Del) that you press simultaneously for
a particular function.
I
input/output
(I/O) The process of transferring data between the computer and external devices.
IDE
Intelligent Drive Electronics. A hard disk drive type that has controller electronics built into
the drive and delivers high throughput.
interface
A connection that enables two devices to communicate.
interrupt
A special control signal from an I/O device that diverts the attention of the microprocessor
from the program to a special address.
K
kilobyte
(KB) 1024 bytes.
L
LAN
Local Area Network.
LCD
Liquid Crystal Display. An LCD consists of a thin sandwich of two glass plates with sealed
edges, containing nematic liquid-crystal material that forms the screen image. The NEC
Versa displays are LCD type.
load
To copy a program into the computer's memory from a storage device.
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