LSIS
| 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 |