sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| North American Duck Symposium | *** |
| National Anti Drug Secretariat | *** |
| North American Dipterists Society | *** |
| Newsletter of the American Dialect Society | *** |
| National Association of Diaper Services | ** |
| Nursing Automated Documentation System | ** |
| Norwegian Association of Defence Suppliers | ** |
| North American Dispense Systems | ** |
| National Alcohol and Drug Survey | ** |
| nasa astrophysics data system | ** |
| Naval Air Development Station | ** |
| National Association for Downs Syndrome | ** |
| Northern Airspace Display System | ** |
| Norwegian Association for Defence Suppliers | * |
| National Advanced Driver Simulator | * |
| National Air Defence System | * |
| North American Datum Standard | * |
| Navy Air Defense System | * |
| NATO Augmented Defense System | * |
| Network Architecture Distribution Service | * |