| Abbreviation | Definition |
|---|---|
| LTC | Lieutenant Colonel - Army |
| LtCol | Lieutenant Colonel - Marines |
| LtCol | Lieutenant Colonel - USAF |
| LTEP | Long- Term Education Plan |
| LTF | Long-Term Fellowship |
| LtGen | Lieutenant General - Marines |
| LTM | Land Transformation Model |
| LTSP | Long- Term Science Plan |
| LTSP | Long-Term Science Plan |
| LTT | Land Transfer Tax |
| LU | Long Unsigned |
| LUC | Labor Unit Control |
| LUCK | Laboring Under Correct Knowledge |
| LUM | Late Undated Misdated |
| LUP | Land Use Plan |
| LUQ | LUQuillo Experimental Forest |
| LUST | Leaking Undergound Storage Tank |
| LUST | Leaking Underground Storage Tanks |
| LV | Likely Voters |
| LVA | Land Value Analysis |