| Abbreviation | Definition |
|---|---|
| ASMRO | Armed Services Medical Regulating Office |
| ASMS | Advanced Surface Missile System |
| ASMT | Air Superiority Missile Technology |
| ASMTRC | ATCCS Simulation and Models Technical Review Committee |
| ASN | Advanced Ship Notice |
| ASN | Assigned Serial Number |
| ASN | Assistant Secretary of the Navy |
| ASN | Assisted Satellite Navigation |
| ASN | Aviation Safety Network |
| ASN(FM&C) | Assistant Secretary of Navy (Financial Management and Comptroller) |
| ASN(I&E) | Assistant Secretary of the Navy (Installations and Environment) |
| ASN(M&RA) | Assistant Secretary of the Navy (Manpower and Reserve Affairs) |
| ASN(RD&A) | Assistant Secretary of the Navy (Research, Development, and Acquisition) |
| ASN(RDA) | Assistant Secretary of the Navy (Research, Development, and Acquisition) |
| ASO | Administrative Service Officer |
| ASO | Advanced Special Operations |
| ASO | Air Support Operations |
| ASO | Air Surveillance Officer |
| ASO | Automatic ShutOff |
| ASO | Aviation Safety Officer |