| Acronym | Definition |
|---|
| LTSA | Land Title and Survey Authority (British Columbia, Canada) |
| LTSA | Long-Term Sickness Absence |
| LTSA | Land Transport Safety Authority (New Zealand) |
| LTSA | Long Term Service Agreement |
| LTSA | Learning Technology Systems Architecture |
| LTSA | Long-Term Space Astrophysics |
| LTSA | Labeled Transition System Analyzer |
| LTSA | Linearly Tapered Slot Antenna |
| LTSA | Low Temperature Starting Aid (Advanced Engine Technology Ltd.) |
| LTSA | Likely to Shop Again (rating) |
| LTSA | Limited Terms Service Account (Apple, Inc.) |
| LTSA | Long-Term Spectral Average |