LSO
- ISO (disambiguation)
- LSO (company)
- Lancaster Symphony Orchestra
- Landing signal officer
- Lansing Symphony Orchestra
- Laotian sign languages
- Large segment offload
- Lateral superior olive
- Law Society of Ontario
- Lesotho
- Liepāja Symphony Orchestra
- Limburg Symphony Orchestra
- List of airports in France
- Local shared object
- Location search optimization
- London School of Osteopathy
- London Symphony Orchestra
- Longwood Symphony Orchestra
- Lubbock Symphony Orchestra
- Lucerne Symphony Orchestra
- Lutetium orthosilicate
- Singapore Legal Service