| 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) |