Ricoh DDP 70e User's Guide Page 144

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Glossary-4
O
OCP. Operator Control Panel.
Operating System. Software that controls the execution of programs.
Orientation. Position of the print on the page. In Portrait orientation, the print runs
from the top to bottom margins across the narrow width of a sheet of paper. In Land-
scape orientation, the print runs from the left to right margins along the length of a sheet
of paper.
OSI. Open Systems Interconnection. A logical structure for network operations (ISO),
to enable multi-vendor equipment interoperability. A seven-layer network protocol
standard.
P
Paper Size. Physical dimensions of the paper.
Parallel Interface. An interface that sends data 8 bits at a time. The printers parallel
interface may be configured for bidirectional (two-way) communications between a
user system and the printer.
Parity check. The process of checking the integrity of a character.
PCL. Hewlett-Packard Printer Control Language.
PDF. Portable Document Format.
PDL. Page Description Language.
Pixel. In electronic publishing, a basic unit of digital imaging.
Porosity. The ratio of the volume of pores in a material to the volume of the whole, as
in a percentage of the volume of pores through which light may pass through paper.
Port. Designates a pathway for the flow of data in or out of a device.
PostScript. A registered trademark of Adobe Systems, Inc.
PPD. PostScript Printer Description file.
Printable area. Area of the physical page in which the printer is able to place a dot.
PROM. Programmable Read-Only Memory.
PWB. Printed Wiring Board.
Q
Queue. A destination for a sequence of stored data or programs awaiting processing,
as in files waiting in line to be sent to the printer.
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