| Abbreviation | Definition |
|---|---|
| LRSU | Long Range Surveillance Unit |
| LRSU | Long-Range Surveillance Unit |
| LRT | Laser Radio Terminal |
| LRTIR | Long Range Tracking and Instrumentation Radar |
| LRU | Line (or Lowest) Replaceable Unit |
| LRU | Line Replacable Unit |
| LRU | Logistics Review Unit |
| LRV | Light Reconnaissance Vehicle |
| LRZ | Long Reconnaissance Zone |
| LS | Land Sea |
| LS | Launch Site |
| LS | Long Shen |
| LS | Longitudinal Section |
| LS3 | Legged Squad Support System (legged robot) |
| LSA | Logistic Support Analysis |
| LSA | Logistics Support Activity |
| LSA | Logistics Support Agency |
| LSA | Logistics Support Analysis |
| LSA | Logistics Support Area |
| LSA | Logistics Supportability Analysis |