| Abbreviation | Definition |
|---|---|
| MWO | My World Order |
| MWT | Mid Week Update |
| MYD | Mid Year Day |
| N | Normative |
| N | Nationalistic |
| N | Night |
| n/d | not done |
| N/R | Not Required |
| NA | Native American |
| NA | Not Allowed |
| NAA | No Acronym Assigned |
| NAA | North American Alliance |
| NAB | National Accountability Bureau |
| NAB | No Accountability Bureau |
| NAB | North American Board |
| NAC | National Advisory Council |
| NACA | National Air Carrier Association |
| NACDA | National Archive of Computerized Data on Aging |
| NACI | national advisory committees on immunization |
| NACS | National Anti-Corruption Strategy |