| Abbreviation | Definition |
|---|---|
| AAS | Association for Academic Surgery |
| AAS | Association for Asian Studies |
| AAS | Association of Amherst Students |
| AAS | Atelier Architecture and Scenography |
| AAS | Austin American Statesman |
| AASA | Aging Adult Services Agency |
| AASAGI | A A??a???? |
| AASAGI | A A_a 1 |
| AASAL | Mzaar Kfardebian |
| AASB | Alabama Association of School Boards |
| AASB | Auditing and Assurance Standards Board |
| AASC | Allergy Asthma Sinus Center |
| AASC | Appalachian Agency For Senior Citizens |
| AASC | Arthritis Associates of Southern California |
| AASC | Avon And Somerset Constabulary |
| AASE | Advanced Apprenticeship in Sporting Excellence |
| AASERE | Amalgamated Association of Street and Electric Railway Employees |
| AASHG | Affinity Association of Self Help Groups |
| AASHG | Association of Assistant Secretaries and Higher Grades |
| AASHG | Association of Assistant Secretaries Higher Grades |