| L2TP |
Layer 2 Tunneling Protocol |
| LAC |
Local Area Coverage |
| LAI |
Location Area Identification |
| LAMAR |
Large Area Modular Array of Reflectors |
| LAMMR |
Large Antenna Multifrequency MW Radiometer |
| LAN |
Local Area Network |
| LAP |
Link Access Protocol |
| LAPB |
Link Access Procedure Balanced |
| LAS |
Launch Abort System |
| Lat |
Latitude |
| LBRDC |
Low Bit Rate Data Communications |
| LCC |
Launch Control Centre |
| LCD |
Liquid Crystal Display |
| LCF |
Launch Control Facility |
| LCH4 |
Liquid Methane |
| LDM |
Linear Delta Modulation |
| LDPC |
Low Density Parity Check |
| LDRO |
Lunar Distant Retrograde Orbit |
| LDTS |
Low Density Telephony Service |
| LDTV |
Limited Definition Television |
| LED |
Light Emitting Diode |
| LEO |
Low Earth Orbit |
| LES |
Land Earth Station |
| LES |
Launch Escape System |
| LF |
Line Feed |
| LFBOT |
Luminous Fast Blue Optical Transient |
| LH2 |
Liquid Hydrogen |
| LHA |
Local Hour Angle |
| LHCP |
Left Hand Circular Polarisation |
| LHP |
Loop Heat Pipe |
| LL |
Low Load |
| LLC |
Logical Link Control |
| LLO |
Low Lunar Orbit |
| LMA |
Limited Motion Antenna |
| LMDS |
Local Multipoint Distribution Service |
| LMES |
Land Mobile Earth Station |
| LMO |
Low Mars Orbit |
| LMSS |
Land Mobile Satellite Service |
| LMT |
Local Mean Time |
| LN2 |
Liquid Nitrogen |
| LNA |
Low Noise Amplifier |
| LNB |
Low Noise Block downconverter |
| LNBF |
Low Noise Block with integrated Feed |
| LNC |
Low Noise Converter |
| LNG |
Liquified Natural Gas |
| LNR |
Low Noise Receiver |
| LO |
Local Oscillator |
| LOF |
Local Oscillator Frequency |
| LOL |
Limit Of Liability |
| Lon |
Longitude |
| LOR |
Loran |
| LOS |
Line of Sight |
| LOS |
Loss of Signal |
| LOV |
Loss Of Vehicle |
| LOX |
Liquid Oxygen |
| LP |
Linear Polarisation |
| LPC |
Linear Predictive Coding |
| LPF |
Low Pass Filter |
| LPFTP |
Low Pressure Fuel Turbopump |
| LPG |
Liquified Petroleum Gas |
| LPS |
Launch Process System |
| LRE |
Low Rate Encoding |
| LRR |
Launch Readiness Review |
| LRU |
Line Replaceable Unit |
| LS |
Letter Shift |
| LS |
Link Switch |
| LSA |
Launch Services Agreement |
| LSB |
Least Significant Bit |
| LSC |
Line Signalling Channel |
| LSE |
Line Signalling Equipment |
| LSG |
Large Signal Gain |
| LSI |
Large Scale Integration |
| LSM |
Line Switch Marker |
| LSO |
Line Signalling Oscillator |
| LSP |
Launch Services Provider |
| LTC |
Loi Sur Les Télécommunications |
| LTE |
Long Term Evolution |
| LTOM |
Less Than One Minute |
| LTOS |
Less Than One Second |
| LV |
Launch Vehicle |
| LVDS |
Low Voltage Differential Signal |
| LZ |
Landing Zone |
