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GLOSSARY
XEROX DOCUPRINT 180 LASER PRINTING SYSTEM PRODUCT GUIDE GLOSSARY-15
offline Devices not under the active control of a central processing unit. For
example, a computer makes output to a magnetic tape. The tape is
then used by an offline printing system to produce printed data.
Offline operations are much slower than online operations. See also
online.
offset To place pages currently being printed in slightly different positions
from previous pages.
offset printing Widely-used method of commercial and corporate printing, where ink
is picked up by a metal or paper plate, passed to an offset drum, and
then passed to the paper.
online Devices under the direct control of a central processing unit, for
example a printing system in interactive communication with a
mainframe. See also offline.
operating system Basic host- or LPS-resident controlling program that governs the
operations of a computer, such as job entry, input/output, and data
management. The operating system is always running when the
computer is active. Unlike other types of programs, it does not run to
an end point and stop. The operating system of a Xerox LPS is
referred to as the operating system software (OSS).
operation Well-defined action that, when applied to any permissible
combination of known entities, produces a new entity.
operator area The 24-inch exclusive clearance that must be available directly in
front of each component of an LPS for operator activities.
operator command Statement to control a program, issued through a console device, PC
UI, or terminal, causing a control program to provide requested
information, alter normal operations, initiate new operations, or
terminate existing operations.
orientation 1. In reference to image area, orientation describes whether the
printed lines are parallel to the long edge of the paper or the short
edge of the paper. 2. Choice of printing portrait (vertically) or
landscape (horizontally).
origin In reference to image area, this is the upper left corner of a sheet.
output 1. Material produced by a peripheral device of a computer, such as a
printout or a magnetic tape. 2. Result of completed operations.
overprinting Printing more than one character at the same position.
overprint lines Print lines whose carriage control specifies printing with no line
spacing after the last printed line.
overprint ratio Maximum number of variable data and form characters that may be
intersected by a single scan line.