A3
| Acronym | Definition |
|---|---|
| A3 | Antena 3 |
| A3 | Alpha 3 (Street Fighter: Alpha 3 game) |
| A3 | Alkaline Trio (band) |
| A3 | Alabama 3 (band) |
| A3 | Anytime, Anywhere, Anyplace |
| A3 | Aegean Cronus Airlines (Greece) |
| A3 | Advanced Avionics Architecture |
| A3 | Armor/Anti-Armor |
| A3 | Adaptive Application Architecture (Gartner) |
| A3 | Affordable Acquisition Approach |
| A3 | Automatic Three Speed |
| A3 | Accelerated Acquisition Approach |
| A3 | Advanced Autonomous Array |