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Glossary-6 Glossary
expansion slot
A receptacle on the system board that accepts a device that adds functionality to the
computer, such as a modem.
Explorer
See Microsoft Internet Explorer, Microsoft Windows Explorer.
extranet
An intranet that is accessible to those not part of the organization by special
permission. See intranet.
File Transfer
Protocol (FTP)
An instruction set that specifies how files are downloaded or uploaded. See
download, upload.
floppy
Informal term for diskette. Also known as 3.5-inch floppy. See diskette.
FTP
See File Transfer Protocol.
full duplex
See duplex.
gamepad
A device that permits more realistic game play than is possible with a mouse or
touchpad.
gameport
See MIDI/Gameport.
GB
See gigabyte.
gigabyte (GB)
A unit of measurement used to describe data quantity. One GB is equal to
approximately one billion bytes. See byte.
graphical user
interface (GUI)
The collection of images and text shown on the monitor display that facilitates the
entry of commands and data. The Windows desktop is a graphical user interface.
GUI
See graphical user interface.
half duplex
Describes a communication channel that is only open in a single direction at any
given time. In telecommunications, it refers to the ability of only one party to
transmit data at any given time. Compare duplex.
hard drive
A device that enables a computer to read data from and write data to a hard disk, an
internal data storage device.
hardware
The physical components of a computer.
hertz (Hz)
A unit of measurement used to describe frequency rate. One hertz is equal to one
cycle per second. See megahertz, microprocessor, refresh rate.