| Acronym | Definition |
|---|
| LLO | Lower Level Orchestrator |
| LLO | Object Oriented Deductive Language |
| LLO | Ligo Livingston Observatory (Livingston, LA) |
| LLO | Listeriolysin O (hemolysin) |
| LLO | Low Lunar Orbit |
| LLO | Large Lakes Observatory (Duluth, Minnesota) |
| LLO | Lipid-Linked Oligosaccharide |
| LLO | Light-toned Layered Outcrops (Valles Marineris Walls, Mars) |
| LLO | Local Loop Operators (Kenya) |
| LLO | Lakeshore Light Opera (Canada) |
| LLO | Laser Local Oscillator |
| LLO | Logical Lines of Operation (US Army) |
| LLO | Legislative Liaison Office |
| LLO | Legislative Liaison Officer (US Army) |
| LLO | Lead Laboratory Office |
| LLO | Loudoun Lyric Opera (Virginia) |
| LLO | Logistics Liaison Office |
| LLO | Leverletto (knife) |
| LLO | Large Leverage Operator |