| Acronym | Definition |
|---|
| PLSI➣Psoriasis Life Stress Inventory |
| PLSI➣Probabilistic Latent Semantic Indexing (statistics) |
| PLSI➣Paragon Learning Style Inventory |
| PLSI➣Pre-Law Summer Institute |
| PLSI➣Preservation League of Staten Island (est. 1977; Staten Island, NY) |
| PLSI➣Pragmatic Language Skills Inventory |