HP 3000 Manuals

Using NS3000/XL Network Services

Conversion Checklist:  DS/3000 to NS3000/XL 

Identify applications using Program-to-Program Communications (PTOP).
PTOP is not supported, so any PTOP applications must be translated so
that they can run on an MPE XL based machine.  If you wish to translate
your PTOP applications so that they can run on NetIPC and RPM, refer to
the translation procedures in Appendix B of theNetIPC 3000/XL 
Programmer's Reference Manual.

MPE/iX 5.0 Documentation