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desktop: The working environment of the Macintosh Finder and Windows systems that
displays folders, files, and applications as icons.
device: A piece of equipment, such as a hard disk, printer, or scanner, used with a com-
puter. Also known as a peripheral.
dialog box: A small window that opens up on the screen to get user input or acknowledg-
ment.
disk space: The amount of space available on a hard disk or floppy disk.
dot gain: An unavoidable increase in the size of halftone dots due to the interaction of
toner, paper, heat, and pressure during the printing process. This increase in dot size
increases the density of toner on paper, causing the printed output to appear darker. GCC’s
AccuGray technology works to counteract the effects of dot gain.
dots per inch (dpi): A measurement of resolution, or the density of dots, for a given output
device. Higher dots per inch usually give better image quality.
download: To send a font to a printer’s built-in memory (RAM) or hard disk.
drop-down list: A section of a dialog box that contains one entry but has a downward-
pointing arrow at the right. Clicking on the arrow reveals a list of alternative choices.
engine: The entire printer apart from the electronics.
EtherNet: A commonly-used network protocol.
flow control: The control of information along an interface to enable the interface to take
only as much information as it can handle.
folder: An organization tool for arranging documents, applications, and other folders on a
storage device. Known as a directory on Windows systems prior to Windows 95.
font: A collection of letters, numbers, punctuation marks, and special characters with a
consistent design. Also known as a typeface.
fuse: To melt toner particles so that they adhere to the paper.
fuser unit: The part of the printer that melts toner particles.
grayscale: The range of gray tones between black and white. The human eye can distin-
guish up to approximately 256 levels of gray.
halftone: An image made up of black toner dots. The printer simulates darker or lighter
shades of gray by printing greater or lesser amounts of dots in each area of the image. This
is a common method of printing photographs.