UBAS
| Acronym | Definition |
|---|---|
| UBAS | University of Birmingham Air Squadron (Royal Air Force; UK) |
| UBAS | Urea Based Ammonia System |
| UBAS | University Burger Appreciation Society (Perth, Australia) |
| UBAS | Under Bonnet Alarm Switch |
| UBAS | University of Birmingham Astronomical Society (UK) |
| UBAS | Under Body Armour Shirt (British military clothing) |