| Acronym | Definition |
|---|
| LSIS➣Learning and Skills Improvement Service (UK) |
| LSIS➣Legal Support Investigative Service (Los Angeles, California) |
| LSIS➣Loral Space Information Systems |
| LSIS➣Large Scale Integrated Systems (software) |
| LSIS➣Life Science Information Service (search engine) |
| LSIS➣Least Squares Importance Sampling |