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Glossary
Glossary 8
data rate In data communications, the rate at which a channel carries
data, measured in bps (bits per second).
data storage Preservation of data on various media (e.g., tape, disks, CD,
magnetic bubble memory, etc.).
data stream Format of data passed from one device to another.
data transmission Transmission of coded data over telephone or other
telecommunication lines.
DCIM Data Control Interface Module. The video interface hardware
which resides in the printer controller for communication with the
printer.
decomposer Printer controller task that translates print data from the PDL
command file into a bitmap image of the page to be printed.
default Predefined value the system uses when another value is not
provided.
device Any piece of hardware other than the CPU (Central Processing
Unit).
DFA Document Feeding and Finishing Architecture. Software that
enables third-party feeding and finishing devices to be attached
to a Xerox printer to perform pre- and post-processing functions
(such as roll-feeding, saddle-stitching, booklet-making, etc.)
diagnostics Programs used to diagnose problems within the system or to
help service personnel pinpoint the source of such problems.
digitize To express or represent data in digital (binary) form so that it can
be processed electronically.
directory Logical grouping of files and subdirectories that are identified by
name. The directory helps organize data on large storage media.
dithering The process in laser printing which uses dot patterns to simulate
shades of gray or tones of a color.
DOS Disk Operating System. Operating system commonly used on
personal computers. See also operating system.
dot Unit of measurement representing a fraction of an inch, for
example, 300 dots per inch (dpi). May also be referred to as a
picture element (pixel) or spot.
dpi Dots per inch. The resolution of the printer image as
represented by the density of the dots.
dry ink Minute particles of resin and carbon black or color pigment toner
deposited and fused onto the page to create images. Toner is
combined with developer to form the dry ink.
duplex Ability to send and receive information simultaneously.