| Abbreviation | Definition |
|---|---|
| NAD | North American Datum |
| NAD | not actually done |
| NADDIS | Narcotics and Dangerous Drugs Information System |
| NADO | NADONational Association of Development Organizations (Washington, DC) |
| NADS | National Alcohol and Drug Survey |
| NAE | Native Americans and the Environment |
| NAEGA | North American Export Grain Association |
| NAF | Non Appropriated Funds |
| NAFI | Non-Appropriated Fund Instrumentality |
| NAFTA | North American Free Trade Area |
| NAI | Native American Indians |
| NAI | North American Interest |
| NAIS | National Animal Identification System |
| NAL | National Aerospace Laboratories |
| NAM | Non Aligned Movement |
| NAMI | Net Allowed Monthly Income |
| NAN | National Alert Network Drug Safety |
| NAP | National Academies Press |
| NAP | National Advantage Plan |
| NAP | Non-Aggression Pact |