SLO
- Jess Mills
- SLO Coast AVA
- SLO Transit
- Salem–Leckrone Airport
- Samalkot Junction railway station
- San Luis Obispo
- San Luis Obispo Coast AVA
- San Luis Obispo County
- Scanning laser ophthalmoscopy
- Secondary lymphoid organ
- Service-level objective
- Slough railway station
- Slovakia
- Slovenia
- Solo Balapan railway station
- Streptolysin O
- Student Learning Objectives
- Supporter liaison officer