HP LaserJet 9000 Printer series - Manual (Page 205)

Appendix C Printer memory and expansion 205
Saving resources (permanent resources)
Saving resources (permanent resources)
Utilities or jobs that you downloaded to the printer sometimes include resources (for example, fonts, macros,
or patterns). Resources that are internally marked as permanent remain in the printer memory until you turn
the printer off.
If you do not have an optional hard disk or flash DIMM for storing downloaded resources, you might want to
change the amount of memory allocated to each language when downloading an unusually large number of
fonts, or if the printer is in a shared environment.
The minimum amount of memory that can be allocated to resource saving is 400 KB each for PCL and PS.