Epson Stylus COLOR 440 Manual page 160

driver A software program that sends instructions to a computer device to
tell it what to do. For example, your printer driver accepts print data
from your image processing application and sends instructions to
the printer on how to print this data.
Error Diffusion This halftoning setting smooths out edges by randomly placing dots
of varying colors. This has the opposite effect of the Finest Detail
setting.
Finest Detail This setting automatically makes your printed images sharper and
clearer. This has the opposite effect of the Error Diffusion setting.
Be aware that this may increase the time required for printing.
font A style of type designated by a name.
gamut The range of colors that a device (such as a printer or monitor) can
accurately reproduce.
grayscale A scale of shades of gray from black to white. Grayscale is used to
represent colors when printing with black ink only.
halftoning A method of using dot patterns to represent an image. Halftoning
makes it possible to produce varying shades of gray using only
black dots, or a nearly infinite array of colors using only a few colors
of dots.
host system The computer connected directly to the printer in a network.
Glossary Page 160