| LISA | Laser Interferometer Space Antenna |
| XIN | X-ray Interferometer |
| LGA | Low Gain Antenna |
| ROSA | Receive Only Satellite Antenna |
| LPA | Logarithmic Periodical Antenna |
| FEA | Fractal Element Antenna |
| GPA | Ground Plane Antenna |
| UHG | Ultrahigh Gain [Antenna] |
| QWA | Quarter Wave Antenna Viertelstab |
| HGA | High Gain Antenna |
| ATI | Antenna Tuning Inductance [engl.] |
| CATV | Community Antenna Television [engl.] Fernsehen mittels Gemeinschaftsantenne |
| AISG | Antenna Interface Standards Groups [engl.] Standardisierungsgruppe im Mobilfunk |
| TSST | Time-Space-Space-Time network |
| LPM | Laser Microprobe |
| LMP | Laser MicroProbe |
| PDL | Pulse Dye Laser |
| HEL | High-Energy Laser |
| HPLJ | Hewlett Packard Laser Jet |
| LRF | Laser-Reduced Fluorescence |
| MLA | Modulated Laser Absorption |
| LSM | Laser Scanning Microscope |
| LTI | Laser Thermal Imaging |
| LIF | Laser-Induced Fluorescence |
| LID | Laser-Induced Desorption |
| RLA | Resonant Laser Ablation |
| LMS | Laser Magnetic Storage |
| LEI | Laser-Enhanced Ionization |
| LEF | Laser-Excited Fluorescence |
| LDV | Laser Doppler Velocimetry |
| LDA | Laser-Doppler-Anemometrie optisches Messverahren |
| LAS | Laser Absorption Spectroscopy |
| PLP | Pulsed Laser Photolysis |
| FP | Fabri-Perrot [-Laser] |
| LWL | Long Wave Laser |
| TSLE | Two-Step Laser Excitation |
| LMR | Laser Magnetic Resonance |
| LWR | Laser Write Read |
| SLR | Satellite Laser Ranging |
| NPDL | Nitrogen-Pumped Dye Laser |
| FEL | Free Electron Laser |
| DFB | Distributed Feedback [-Laser] |
| MOLE | Molecular Optics Laser Examiner |
| LIS | Laser-induced Isotope Separation |
| LIRF | Laser-Induced Resonance Fluorescence |
| LIPS | Laser-Induced Plasma Spectroscopy |
| COLD | Computer Output to Laser Disc |
| LMDR | Laser Microwave Double Resonance |
| LGMR | Laser Guided Magnetical Recording |
| LAF | Laser Atomic Fluorescence spectroscopy |