Xerox 721 Message Manual page 311

GLOSSARY
operating
operator
GLOSSARY-18
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.
operand Object of an action, operation, or process.
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 1. Part of a process description that indicates the action to be
performed on an operand. For example, ADD is an operator that
uses two operands (in this case numbers) and produces a third.
2. Person who operates a device.
operator area The 24-inch exclusive clearance that must be available directly in
front of each component of an LPS for operator activities.
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.
override To take precedence or priority over, to overrule.
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE