| Abbreviation | Definition |
|---|---|
| LR | Landing Radar |
| LR | Launch Right |
| LR | Left Rudder |
| LR | Lever Release |
| LR | Low Rate |
| LR | Lower Right |
| LR/LD | Line Receiver/Line Driver |
| LRECL | Logical Records of Fixed Length |
| LRF | Liquid Rocket Fuel |
| LRI | Lunar Rover Initiative |
| LRL | Lunar Receiving Laboratory |
| LRO | Large Radio Observatory |
| LRO | Lunar Reconnaissance Orbiter |
| LRR | Launch Readiness Review |
| LRSI | Low Temperature Reusable Surface Insulation |
| LRV | Launch Readiness Verification |
| LRV | Long Range Video |
| LRV | Lunar Roving Vehicle |
| LS | Landing Side |
| LS | Launch Sequence |