| Acronym | Definition |
|---|
| SSTU➣Saratov State Technical University (Russia) |
| SSTU➣State School Teachers' Union (Australia) |
| SSTU➣Street Survival Training Unit (New Zealand) |
| SSTU➣Single Stage to Utah (slang for X-33, built to test Lockheed VentureStar Concept SSTO - RLV) |