Here you will find a list of the KM articles I found relevant on the SSO website for Network Node Manager product.
NNM Advanced Edition device & protocol support
Support Matrices for HP Software NNM, Dev Agent and, NNM SPI
URL of interest:
Software Support Online
http://support.openview.hp.com/support.jsp (HP Passport sign-in required)
Software Support Online Self-Solve Knowledge Advanced-Search
http://support.openview.hp.com/selfsolve/documents (HP Passport sign-in required)
HP Software Support Life cycle http://support.openview.hp.com/prod-sppt-lifecycle/index.jsp
Obsolescence & Migrations http://support.openview.hp.com/encore/products.jsp
HP Network Node Manager (NNM) software 7.0x http://support.openview.hp.com/encore/nnm7_0x.jsp
HP Network Node Manager (NNM) software 7.5x & Smart Plug-ins http://support.openview.hp.com/encore/nnm7.5x_and_spis.jsp
HP Network Node Manager (NNMi) 8.0x & Network Node Manager Smart Plug-in for Performance 8.0x http://support.openview.hp.com/encore/nnmi8.0x_and_ispi.jsp
Operations 7.x for UNIX & Advanced Security 7.x http://support.openview.hp.com/encore/ovou7x.jsp
HP Operations Manager on Unix (OMU) software 8.x http://support.openview.hp.com/encore/om_unix_8.x.jsp
HP Operations Agent 8.1x & 8.5x http://support.openview.hp.com/encore/operations_agent.jsp