NDAI
| Acronym | Definition |
|---|---|
| NDAI | No Doubt About It |
| NDAI | North Down and Ards Institute (Northern Ireland, UK) |
| NDAI | No DoD (Department of Defense) Action Indicated (US DoD) |
| NDAI | National Diversity Assurance Initiative (business organization) |
| NDAI | Natural Data Asia, Inc. (est. 1997; Taiwan) |