SNMP OBJECT ID NETWORK DISCOVERY

Does anyone have a list of SNMP object IDs? Am a admin on a 2500 computer chunk of a huge Active Directory Enterprise environment. Running 7.5 SP 1 Network Discovery againt our range of IP addresses looking for anything connected to the network.

Network Discovery does great job of finding everything,however it also has found 1100 "Unnown" devices whch I am sure are printers,switches,etc.

Does anyone know of or have a comprehensive list of SNMP Object IDs that I can import in to SMP to hep identify the objects?

Thanks in advance.