A/S
| Acronym | Definition |
|---|---|
| A/S | Age/Sex |
| A/S | Assistant Secretary |
| A/S | Aux Soins De (French: in care of) |
| A/S | Authorized Shares (stock market) |
| A/S | Anti-Spoofing (US DoD) |
| A/S | Anti-Submarine |
| A/S | Aktieselskab (Danish: Joint Stock Company) |
| A/S | Aerospace Corporation |
| A/S | All Square (golf) |
| A/S | Air to Surface |
| A/S | Auxiliary Steam |
| A/S | Ascent Stage |
| A/S | Advanced Supplementary (education testing level; also seen as AS) |
| A/S | Antisurface |
| A/S | Akcijas Sabiedriba (Latvian: Joint Stock Company) |