| N |
| Acronym |
Definition |
Added/Updated |
| N/A |
No answer |
06/30/2000 |
| N/A |
Not applicable / not available |
06/30/2000 |
| N/R |
Not required |
06/30/2000 |
| NA |
National Archives |
06/30/2000 |
| NA |
Nonattainment |
06/30/2000 |
| NA |
Not applicable |
06/30/2000 |
| NA |
Nuclear assessment |
06/30/2000 |
| NAA |
National Association of Accountants |
06/30/2000 |
| NAA |
Neutron-activation analysis |
06/30/2000 |
| NAA |
Nonattainment area |
06/30/2000 |
| NAACP |
National Association for the Advancement of Colored People |
06/30/2000 |
| NAAG |
National Association of Attorneys General |
06/30/2000 |
| NAAO |
North America Aircraft Operations |
06/30/2000 |
| NAAQS |
National Ambient Air Quality Standards |
06/30/2000 |
| NAAS |
National Air Audit System (OAR) |
06/30/2000 |
| NAAS |
North American Automated Systems Company |
06/30/2000 |
| NAB |
National Association of Braodcasters |
06/30/2000 |
| NAC |
National agency checks |
06/30/2000 |
| NACA |
National Association of Cost Accountants |
06/30/2000 |
| NACA* (OBSOLETE) |
National Agricultural Chemicals Association |
01/31/2008 |