| Abbreviation | Definition |
|---|---|
| LES | Launch Entry Suit |
| LES | Launch Equipment Shop |
| LES | Launch Escape System |
| LESS | Leading Edge Structure Subsystem |
| LESS | Leading Edge Structure System |
| LESS | Leading Edge Subsystem |
| LETF | Launch Equipment Exposure Facility |
| LETF | Launch Equipment Test Facility |
| LETF | Launch Equipment Test Facility (KSC) |
| LF | Launch Forward |
| LF | Left Forward |
| LF | Load Factor |
| LFAF | Low Frequency Accelerometer Flutter |
| LFAL | Lower Flame Acceleration Limit |
| LFAM | Low Frequency Accelerometer Mode |
| LFAP | Low Frequency Accelerometer Pogo |
| LFC | Large Format Camera |
| LFC | Laser Fired Contacts |
| LFO | Liquid Fuel Oxidizer |
| LFO | Low Frequency Oscillator |