FUJITSU fi-4120C - Manual (Page 167)

GL-2
Bit
The smallest unit of information in computer memory. A bit is a sin-
gle digit, either a 1 or a 0, in the binary numbering system. Eight
bits equal one byte.
Density
In this manual, refers to a measurement of the depth of the display.
Dither
Technique for producing halftone images by representing the entire
grayscale with only two pixel levels, black and white.
Double feed detection
A scanner function which detects the accidental feeding of multiple
sheets by the ADF unit. Can be turned on or off by the operator.
Double Letter Size
A standard paper size used in the U.S.A. and other countries.
Paper size is 11 x 17 inches.
dpi
Dots per inch.
Dropout color
A color which is used in the document but does not appear in the
read image.
Duplex reading mode
A reading mode in which both sides of the document are read.