| Acronym | Definition |
|---|
| A&A➣Art and Architecture |
| A&A➣Astronomy and Astrophysics |
| A&A➣Accounting and Auditing |
| A&A➣Assessment and Authorization (various companies) |
| A&A➣Ask & Answer (forums) |
| A&A➣Archaeology and Anthropology |
| A&A➣Aid and Attendance (VA benefit) |
| A&A➣Additions and Amendments |
| A&A➣Aly & AJ (pop singing sister duo) |
| A&A➣Advertise and Award (NASA) |
| A&A➣Acronyms & Abbreviations |
| A&A➣Arrival and Assembly |
| A&A➣Arcade & Attica (railroad) |
| A&A➣Alteration & Addition |
| A&A➣Ass and Alcohol (GI update of R&R) |
| A&A➣Akasam & Associates (accountants, Hyderabad, India) |