| Nuclear Power Accident | Academic & Science |
| Northwest Prospects Academy | Academic & Science |
| Northcoast Preparatory Academy | Academic & Science |
| Northland Preparatory Academy | Academic & Science |
| Network Peripheral Architecture | Academic & Science |
| Pensacola (fl) | Airport Code |
| Non Performing Asset | Banking |
| Northern Pueblos Agency | Business |
| National Prescription Administrators | Business |
| National Pharmacists' Association | Business |
| North Pacific Airlines | Business |
| Non Public Agency | Business |
| Non-Performing Asset(s) | Business |
| National Promotions and Advertising | Business |
| Network Pacific Asia | Business |
| Nilcrom Porcelain Australia | Business |
| National Particleboard Association | Business |
| Normal Propyl Alcohol | Chemistry |
| National Pimp Association | Community |
| Natural Philosophy Alliance | Community |
| Not Paying Attention | Community |
| National Policy Association | Community |
| National Pig Association | Community |
| National Pigeon Association | Community |
| Norwegian People’s Aid | Community |
| National Parking Association | Community |
| Newark Pride Alliance | Community |
| Network Professional Association | Community |
| National Perinatal Association | Community |
| Nonfiction Producers Association | Community |
| National Parks Association | Community |
| National Preparatory Association | Community |
| National Pokemon Association | Community |
| National Polygraph Association | Community |
| National Pasta Association | Community |
| National Phlebotomy Association | Community |
| Nevada Psychological Association | Community |
| National Pediculosis Association | Community |
| National PACE Association | Community |
| Nigerian Port Authority | Community |
| National Pitching Association | Community |
| Northwest Pyrotechnics Association | Community |
| Natural Products Association | Community |
| National Pawnbrokers Association | Community |
| National Portage Association | Community |
| Nebraska Pharmacists Association | Community |
| National Postdoctoral Association | Community |
| Newspaper Publishers Association | Community |
| Network Provider Access | Computer and Networking |
| Numbering Plan Area | Computer and Networking |
| Non Participant Assembly | Computing |
| Network Printing Alliance | Computing |
| Netware Peripheral Architecture | Computing |
| Number Portability Area | Computing |
| Network Point of Attachment | Computing |
| National Phreaker's Alliance | Computing |
| Northern Phreaker's Alliance | Computing |
| No Power Alarm | Computing |
| No Picture Available | Computing |
| Number of Projected Attributes | Database Management |
| Notice of Proposed Amendments | General |
| Nationwide Programmatic Agreement | General |
| Non Product Affiliated | General |
| Neighborhood Preservation Act | General |
| Non Public Assistance | General |
| Non Privilege Asset | General |
| Non Pronounceable Acronym | General |
| Notary Public Administrators | General |
| Non Personalized Ads | General |
| No Permanent Address | General |
| National Processing Agreement | General |
| Notice of Proposed Assessment | General |
| National Performing Assets | General |
| Nationwide Pawnbrokers Affiliation | General |
| Next Preventative Appointment | General |
| National People's Action | General |
| Non Personal Awareness | General |
| National Petroleum Association | General |
| Non Peroxide Activity | General |
| National Powersport Auctions | General |
| Neighborhood Partners in Action | General |
| National Partnership for Action | General |
| Non Prosecution Agreement | General |
| Northern Periphery and Arctic | General |
| National Pigeon Associarion | General |
| National Priority Area | Governmental |
| National Program of Action | Governmental |
| No Party Affiliation | Governmental |
| Neighborhood Planning Assemblies | Governmental |
| Nigeria Police Academy | Governmental |
| National Procurement Authority | Governmental |
| National Prosecution Authority | Governmental |
| Northwest Perennial Alliance | Governmental |
| National Physicians Alliance | Governmental |
| Nigerian Ports Authority | Governmental |
| National Prosecuting Authority | Governmental |
| Non-Partisan Association | Governmental |
| National Programme of Action | Governmental |
| Nouveau Parti Anticapitaliste | Governmental |
| National Production Authority | Governmental |
| National Police Academy | Governmental |
| National Prescription Audit | Governmental |
| National Pharmaceutical Association | Governmental |
| No Political Affiliation | Governmental |
| Nawong Puros Agtang | International |
| Next Point of Action | Internet |
| Net Pay Advice | Jobs |
| nasopharyngeal Aspiration | Medical |
| Nursing Practice Act | Medical |
| Northeast Pediatric Associates | Medical |
| Nurse Practitioner Association | Medical |
| New Pheromone Additive | Medical |
| NasoPharyngeal Airway | Medical |
| nasopharyngeal aspirate | Medical |
| National Pharmacy Association | Medical |
| National Prostate Association | Medical |
| near field accommodation | Medical |
| Neutral Protease Activity | Medical |
| Nurse Practice Act | Medical |
| No Parents Allowed | Messaging |
| No Parental Authorization | Messaging |
| New Peoples Army | Military and Defence |
| Network Point Address | Networking |
| Nuclear Physics A | Physics Related |
| Northern Plains Area | Regional |
| National Plan of Action | Regional |
| North Pacific Ocean | Regional |
| Novell Product Announcement | Softwares |
| Nosferatu Players Association | Sports |
| Numeral Prefix Allocation | Telecommunication |
