AAS

AAS is an acronym for terms including:

• Academy of Applied Science
• Aeromedical Airlift Squadron
• American Association of Suicidology
• Asian American Studies
• Association for Asian Studies
• Atomic Absorbption Spectroscopy
• Australian Academy of Science

Lots of American [A term] societies including:

• American Astronautical Society
• American Astronomical Society
• American Astrophysical Society
• American Antiquarian Society