| Abbreviation | Definition |
|---|---|
| LSR | Land and Sea Research |
| LSRA | Life Science Research Announcement |
| LSRF | Life Sciences Research Foundation |
| LSRI | Lake Superior Research Institute |
| LSRI | Learning Sciences Research Institute |
| LSRI | Leonard Schanfield Research Institute |
| LSRI | Life Science Research Israel |
| LSRI | Life Sciences Research Institute |
| LSRI | Local Site Research Initiative |
| LSRO | Life Science Research Office |
| LSRO | Life Science Research Organization |
| LSRV | Land Speed Research Vehicle |
| LTAR | Long Term Agroecological Research |
| LTAR | Long Term Agroecosystem Research |
| LTCCS | Large Truck Crash Causation Study |
| LTDR | Learning Technologies Design Research |
| LTER | Long Term Ecosystem Research |
| LTR | Language Teaching Research |
| LTRAS | Long Term Research on Agricultural Systems |
| LTRC | Language Testing Research Colloquium |