| Abbreviation | Definition |
|---|---|
| LW | Launch Window |
| LW | Living Worlds |
| LWD | Launch Window Display |
| LWD | Left Wing Down |
| LWG | Logistics Working Group |
| LWHS | Light-Weight HeadSet |
| LWR | LoWeR |
| LWS | Lightning Warning System |
| LWS | Low Water Sensitivity |
| LWT | Launch Window Time |
| LWT | Light Weight Tank (Space Shuttle) |
| LZT | Large Zenith Telescope |
| M | Mach |
| M | Maintainability |
| M | Major Cycle |
| M | Male |
| M | Manual |
| M | Mars |
| M | Mass |
| M | Matrix |