What does NPN stand for?

NASA Part Number (MCD)

National Particulate Network - Environmental Protection Agency (GFGA)

National Party of Nigeria - Political party (PPW)

National Performance Network (EA)

National Prevention Network (EA)

National Prices Network

Neptune Sails, Sterling Heights, MI - Manufacturer code for watercraft hull identification number (USCG)

Newport News, VA - Amtrak rail station code

New Product Network - Television

New Pseudonyms and Nicknames - A publication

Non-Par Not Approved

Non-Physician Practitioner (SAUS)

Nonprotein Nitrogen - Analytical chemistry

Normal Propyl Nitrate (MCD)

Notes Public Network (SAUS)