HP PCL/PJL reference - Printer Job Language Technical Reference Manual

Glossary-4 EN
Non-Printing Mode
Printing selected pages in a print job by sending the entire print job,
the desired starting page number, and the ending page number. The
PJL JOB command options START and END are used to provide the
starting page number and the ending page number. When the printer
processes the pages that are not printed, the printer is said to be in
non-printing mode.
Non-Volatile Memory
Random Access Memory where contents are preserved when the
printer is powered off (volatile RAM is memory where contents are not
preserved when the device is powered off).
Offline/Online
Online is a condition during which the printer accepts data from the
host computer. When the printer is online, the ON LINE light is lit.
When offline, the printer cannot accept data from the host.
Personality
The printer firmware related to transforming a particular type of
printer language data, like PCL or PostScript, into images that the
printer's operating system can print. The printer uses different
personalities (different firmware) to handle data from different printer
languages. PCL and PostScript commands are each processed by
separate firmware.
New personalities can be added to some LaserJet printers using
means such as cartridges or ROM SIMMs. PJL is not a personality
(you cannot print using PJL). See “Personality Switching.”
Personality Switching
The process of shutting down the current personality and activating
the appropriate personality to process the next print job. For example,
when the printer is processing PCL data, the PCL personality is
activated; for PostScript data, the PostScript personality is activated.