| Abbreviation | Definition |
|---|---|
| LD | Launch Director |
| LD | Loading Dock |
| LDB | Launch Data Bus |
| LDB | Logistics Data Bank |
| LDEC | Lunar Docking Events Controller |
| LDEF | Long Duration Exposure Facility |
| LDG | LanDinG |
| LDIU | Launch Data Interface Unit |
| LDMK | LanDMarK |
| LDMS | Langley Directives Management System |
| LDR | Large Deployable Reflector |
| LDS | Landing, Deservicing, and Safing |
| LDS | Landing/Deceleration Subsystem |
| LDS | Laser Docking Sensor |
| LDS | LoaDS |
| LDT | Linear Displacement Transducer |
| LE | Launch Escape |
| LE | Leading Edge |
| LEA | Logistics Engineering Analysis |
| LEAP | Lunar Eclipse Analogue Project |