| Abbreviation | Definition |
|---|---|
| AARS | Army Amateur Radio System |
| AART | Assessment and Recovery Team |
| AARTS | American Council on Education Registry Transcript Service |
| AARTS | Army/American Council on Education Registry Transcript Service |
| AAS | Advanced Automation System |
| AAS | Alert Area Supervisor |
| AAS | Analysis of Alternatives Study |
| AAS | Army Apprentices School |
| AASA | Administrative Assistant to the Secretary of the Army |
| AASA | America's Army Server Administrators |
| AASAM | Active Army Seasonalized Accession Model |
| AASAM | Australian Army Skill at Arms Meeting |
| AASC | Anti-Aircraft Searchlight Company |
| AASC | Army Acquisition Support Center |
| AASC | Australian Army Service Corps |
| AASDA | Anti-Armor Systems DetectAbility |
| AASF | Advanced Air Striking Force |
| AASF | Army Area Signal Center |
| AASF | Army Aviation Support Facility |
| AASG | Amphibious Afloat Support Group |