Hewlett-Packard LaserJet-compatible font cartridges are supplied by numerous manufacturers, including Hewlett-Packard, Pacific Data Products, and IQ Engineering. Some cartridge vendors also produce custom font cartridges to your specifications.
Windows NT treats font cartridges as device fonts because they are always with the printer. Font cartridges can be selected in the Printer Properties dialog box. The HPPCL minidriver available with Windows NT can support all HP font cartridges.
If you want to add a font cartridge that came out after the printer driver was written, you may need a printer cartridge metrics (.PCM) file. A .PCM file tells Windows NT the characteristics of the new font and is installed with the Font Installer in the same way as soft fonts. After a .PCM file is installed, a new entry appears in the Cartridges dialog box of the Printer Properties dialog box.
For new HP cartridges, contact Hewlett-Packard or other cartridge vendor for the appropriate .PCM file.