SFF
- Felts Field
- Sarajevo Film Festival
- Saraqusta Film Festival
- Science Festival Foundation
- Science fiction and fantasy
- Seychelles Football Federation
- Shooters, Fishers and Farmers Party
- Small Form Factor Committee
- Small form factor PC
- Somali Football Federation
- Space Frontier Foundation
- Special Field Force
- Special Frontier Force
- Spiritual Frontiers Fellowship
- Standard flowgram format
- Stone Family Foundation
- Sydney Film Festival