net primary productivity 
net primary production 
Nuclear Power Plant 
Naval Propellant Plant 
NIPPONDENSO 
NPOESS Preparatory Project 
National Policy Paper 
National Protection and Programs 
NPOESS Preparatory Program 
Narrative Project Plan 
National Partnership Program 
National Partnership Protocol 
National Peoples' Party 
National Pesticides Policy 
National Policing Plan 
National Population Policy 
National Pretreatment Program 
National Priority Program 
National Privacy Panel 
National Privacy Principles 
negative predictive power 
Net Print Providers 
Network Packet Provider 
Network Payment Protocol 
Network Printing Protocol 
Network Programming Platform 
Network Protocol Processor 
new permeation pathways 
New Physics Project 
New Policy Proposal