| Abbreviation | Definition |
|---|---|
| MYWA | Michigan Youth Workers Association |
| MYWA | Michigan Youth Wrestling Association |
| NAA | National Aeronautic Association |
| NAA | National Aeronautics Association |
| NAA | National Aerosol Association |
| NAA | National AfterSchool Association |
| NAA | National Algae Association |
| NAA | National Alumni Association |
| NAA | National Association of Accountants |
| NAA | National Association of Appraisers |
| NAA | National Auctioneers Association |
| NAA | National Aviation Association |
| NAA | Nebraska Arborists Association |
| NAA | Newburyport Art Association |
| NAAA | National Agricultural Aviation Association |
| NAAA | National Auto Auction Association |
| NAAA | Nebraska Adoption Agency Association |
| NAAAP | National Association of Asian American Professionals |
| NAAAP | North American Association of Asian Professionals |
| NAAC | National Association for Athletics Compliance |