| Abbreviation | Definition |
|---|---|
| NAAT | National Association of Academic Technologists |
| NAATA | North American Automobile Trade Association |
| NAB | National Association Broadcasters |
| NAB | Northamptonshire Association for the Blind |
| NABA | National Algae Biomass Association |
| NABA | National Archery Buyers Association |
| NABA | National Association of Buyers Agents |
| NABA | National Association of Buyer's Agents |
| NABA | Native American Bar Association |
| NABA | Nebraska Auto Body Association |
| NABA | North American Brewers Association |
| NABA | Northeastern Association of the Blind at Albany |
| NABA | Northland Area Builders Association |
| NABB | Nationwide Association of Blood Bikes |
| NABB | Neighborhood Association of the Back Bay |
| NABC | National Association of Basketball Coaches |
| NABD | National Association for Bikers with a Disability |
| NABD | National Association of Broker Dealers |
| NABD | National Association of Building Designers |
| NABE | National Association for Bilingual Education |