| AAAS | American Association for the Advancement of Science |
|---|---|
| AALAS | American Association of Laboratory Animal Science |
| AIPS | American Institute of Pathologic Science |
| ANS | acanthion; American Nutrition Society; 8-anilino-1-naphthalene-sulfonic acid; anterior nasal spine; ... |
| ARCS | Associate of the Royal College of Science |