This is the README for HP_LaserJet_4_ppds.d.tar.gz [Download] [Browse] [Up]
These are the PPD files which NeXT Release 3.0 would need in order to talk to HP LaserJet 4 printers that have the PostScript support added. Note that an HP LaserJet 4M is just a LaserJet 4 with postscript and some extra memory. The original upload of these files had some kind of error in the HP_LaserJet_4_PostScript_600DPI.ppd file. This upload corrects that. For your NeXT to use these files, you'd want to store them in /LocalLibrary/PrinterTypes/English.lproj These files were picked up from the HPPER board on CompuServe.
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.