| North American Patristics Society | Academic & Science |
| Nucleic Acid Production Service | Academic & Science |
| North Amarican Parrot Society | Academic & Science |
| National Association of Physics Students | Academic & Science |
| Nissan Anti-Pollution System | Business |
| National Association of Personnel Services | Community |
| National Association of Postal Supervisors | Community |
| National Association for Peer Specialists | Community |
| National Association for the Prevention of Starvation | Community |
| Nimbus Automatic Programming System | Computing |
| North American Precis Syndicate | General |
| No Agents Premiums Specialties | General |
| North American Power Symposium | General |
| Nutrition Assistance Program for Seniors | General |
| National Application Processing Screening | General |
| North American Prospects Showcase | General |
| Not Another PDF Scanner | General |
| Nencki Affective Picture System | General |
| Naim Audio Power Supply | General |
| National Application Processing and Screening | General |
| Nucleiod Associated Proteins Supercoiling | General |
| Non Adaptive Pleasure Seeking | General |
| National Anti Poverty Strategy | General |
| Nishnawbe-Aski Police Service | Governmental |
| Narora Atomic Power Station | Governmental |
| Navy Acquisition Procedures Supplement | Governmental |
| National Air Pollution Surveillance | Governmental |
| Naval Academy Preparatory School | Governmental |
| Naked Asian Pop Stars | International |
| Nurse Administered Propofol Sedation | Medical |
| New Anxious Parent Syndrome | Medical |
| National Acute Porphyria Service | Medical |
