HP 220240 - Manual (Page 250)

NVRAM
Nonvolatile random-access memory. Nonvolatile means that data is
retained in NVRAM even after the printer is powered off. NVRAM is
particularly useful when you are setting up the printer configuration,
because all of the values can be saved and retained.
off line
A communications mode during which the printer cannot receive data from
the host computer. When the On Line indicator is off, it indicates that the
printer is off line.
on line
A communications mode during which the printer can receive data from
the host computer. When the On Line indicator is on, it indicates that the
printer is on line.
operating memory
Contains the current print settings loaded from NVRAM, and any
modifications. Operating memory is RAM, and is cleared when the printer
is powered off. Operating memory is sometimes known as ‘‘working
memory.’’
ozone filter
Removes ozone generated by the printer. The ozone filter should be replaced
every 100,000 pages. Never operate the printer without the ozone filter
installed. Operating the printer without the ozone filter installed could be
hazardous to your health.
page
In the context of a laser printer, the image you are printing; you can print
up to two pages per sheet (one page per side).
parallel interface
A data communications interface that transmits multiple bits of data
(usually in 1-byte segments) simultaneously. The DEClaser 2200 printer
uses a Centronics parallel interface.
portrait printing
A method of printing characters parallel to the short edge of the paper.
This is the normal page orientation for printing. For example, this page is
printed in a portrait orientation.
Glossary–5