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GLOSSARY
GLOSSARY-16 XEROX 4890 HIGHLIGHT COLOR LPS INSTALLATION PLANNING REFERENCE
point size Height of character set from the top of its ascenders to the
bottom of its descenders in units (points). Point size does not
always include leading.
portrait Orientation in which text and images are positioned parallel to
the short edge of the paper.
PostScript Proprietary page definition language, compatible with the Xerox
4890 Highlight Color LPS when a front-end conversion utility is
installed.
ppm Pages per minute.
print quality adjustment See PQA.
primary color A color that, when combined with one or more other primary
colors in a color model system in varying quantities, produces
the palette of colors described by that model.
print description language See PDL.
print ratio The maximum number of variable data and form characters that
may be intersected by a single scan line.
printer subsystem controller See PSC.
print file Portion of the system disk memory (up to 4 MB) reserved for
temporary storage of formatted pages for printing. Pages are
retained until they are delivered to the output tray.
PQA The process the 4890 HighLight Color LPS uses to maintain the
electrostatic state of the xerographic subsystem to ensure
optimal print quality.
printout Informal expression referring to almost anything printed by a
computer peripheral device.
PROM Programmable read-only memory.
prompt Message or symbol displayed on a system console requiring the
operator to take action.
process color printing In process color printing, every color in the spectrum is printed
by combining various percentages of the four-color process
primary colors–cyan, magenta, yellow, and black.
processor Applies to any system that is capable of receiving and performing
operations upon data and supplying the results of those
operations.