sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Access to Space Office | ** |
| Australian Technical Standard Orders | ** |
| Air Traffic Services Organisations | ** |
| Air Traffic Service Organisations | * |
| Airborne Threat Simulation Organization | * |
| Alternative Transitional Standard Offer | * |
| Authorized Training and Support Organization | * |
| Air Traffic Services Organisation | * |
| Authorized Training and Service Organization | * |
| Ability to Servive and Operate | * |