Glossary
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
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.
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