LSA
- Almond
- Anterolateral central arteries
- Cam (mechanism)
- College of Literature, Science, and the Arts
- Flax
- ISA (disambiguation)
- La Salle Academy
- Lakshmipat Singhania Academy
- Late Stone Age
- Latent semantic analysis
- Law Society of Alberta
- Law and Society Association
- League for Socialist Action
- Learn and Serve America
- Least squares adjustment
- Licentiate of the Society of Apothecaries
- Lichen sclerosus et atrophicus
- Light-sport aircraft
- Limited symptom attack
- Linguistic Society of America
- Link-state advertisement
- Lithuanian Space Association
- Liver stage antigen
- Local Security Authority Subsystem Service
- Local Spiritual Assembly
- Logistics Support Analysis
- Logistics Support Area
- London Small Arms Co. Ltd
- London Stansted Airport
- Lone Scouts of America
- Lone Star Alliance
- Losuia Airport
- Luisia
- Lutheran Services in America
- Luxembourg Space Agency
- Lysergic acid amide
- Lytham St. Annes
- Lötfrei, schraubfrei, abisolierfrei
- SART
- Small Arms
- Society of Apothecaries
- Student Union of Latvia
- Sunflower seed
- University of Liverpool School of Architecture