NCAI
| Acronym | Definition |
|---|---|
| NCAI | National Congress of American Indians |
| NCAI | National Coalition for Adult Immunization |
| NCAI | National Conference on Artificial Intelligence |
| NCAI | Neighborhood Cleaners Association International (New York, NY) |
| NCAI | National Committee on Atomic Information (est. 1945; Federation of American Scientists) |
| NCAI | North Central Area Interconnect (school consortium; South Dakota) |