| Abbreviation | Definition |
|---|---|
| NAGIS | National Airport Grant Information System |
| NAIA | Ninoy Aquino International Airport |
| NAIAS | North American International Auto Show |
| NAIC | National Association of Insurance Commissioners |
| NAILS | National Airspace Integrated Logistics Support |
| NAIMS | National Airspace Information System |
| NAM | North American Region |
| NAM | Number Assignment Module |
| NAPRS | National Airspace Performance Reporting System |
| NAR | North American Routes |
| NARACS | National Radio Communications System |
| NASBLA | National Association of State Boating Law Administrators |
| NASIP | National Aviation Safety Inspection Program |
| NASMAP | NAS Management Automation Program |
| NASP | National Airspace System Plan |
| NASPAC | National Airspace System Performance Analysis Capability |
| NASPALS | Nas Precision Approach and Landing System |
| NASS | National Accident Sampling System |
| NAT | North Atlantic Region |
| NATC | North American Transportation Consultants |