| Abbreviation | Definition |
|---|---|
| NACC | Northern Athletics Collegiate Conference |
| NACCHO | North American Camping Conference of Hemophilia Organizations |
| NACE | National Autobody Congress and Exposition |
| NACOEJ | North American Conference of Ethiopian Jewry |
| NACOEJ | North American Conference On Ethiopian Jewry |
| NAECON | IEEE National Aerospace and Electronics CONference |
| NAFIPS | Biennial Conference of the North American Fuzzy Information Processing Society |
| NAIC | North American Interfraternity Conference |
| NAIS | North American IPv6 Summit |
| NALC | National Aging and Law Conference |
| NALC | North American Leadership Conference |
| NALS | North American Leaders Summit |
| NALS | North American Leaders' Summit |
| NAMC | North American Masonry Conference |
| NAMM | National Annual Musicians' Meeting |
| NAOC | National Advisory Organizations Conference |
| NAOC | North American Ornithological Conference |
| NAPSYM | North American Power SYMposium |
| NARBC | North American Reptile Breeders Conference |
| NASC | National Archaeology Students Conference |