| Abbreviation | Definition |
|---|---|
| NACI | National Agency Check and Written Inquiries |
| NACISA | North Atlantic Treaty Organization (NATO) Communications and Information Systems Agency |
| NACISC | North Atlantic Treaty Organization (NATO) Communications and Information Systems Committee |
| NACMA | NATO Air Command and Control System Management Agency |
| NACMO | Net Additional Cost of Military Operations |
| NACMO | Net Additional Costs of Military Operations |
| NACSEM | National Communications Security/Emanations Security (COMSEC/EMSEC) Information Memorandum |
| NACSI | National Communications Security (COMSEC) Instruction |
| NACSI | National COMSEC Information |
| NACSIM | National Communications Security (COMSEC) Information Memorandum |
| NACWC | National Authority Chemical Weapons Convention |
| NAD | Naval Armament Depot |
| NADB | Network Accessible Database |
| NADC | aval Air Development Center, Warminster, PA |
| NADC | Naval Air Development Center, Warminster, PA |
| NADCAP | National Aerospace And Defense Contractors Accreditation Program |
| NADEFCOL | North Atlantic Treaty Organization (NATO) Defense College |
| NADEP | Naval Aircraft Depot |
| NADEP | Naval Aviation DEPot |
| NADGE | NATO Air Defence Ground Environment |