| Abbreviation | Definition |
|---|---|
| SAI | Sweet Adelines International |
| SAIF | Seniors Against Investment Fraud |
| SAIF | South African Institute of Foundrymen |
| SAIF | Stop Abuse In Families |
| SAL | Sons of the American Legion |
| SALB | San Antonio Lighthouse for the Blind |
| SALN | Saskatchewan Aboriginal Literacy Network |
| SALSF | Somerset Aggregates Levy Sustainability Fund |
| SAM | Serving Annual Members |
| SAME | Students Against Migrant Exploitation |
| SANBS | South African National Blood Service |
| SANDS | Stillbirth and Neonatal Death Support |
| SANE | National Committee for a Sane Nuclear Policy (now called Peace Action) |
| SAP | Scholarship Assistance Program |
| SAPA | Sir Arthur Pearson Association of War-Blinded (individual Vererans' Association) |
| SAPF | Save A Patriot Fellowship |
| SAPF | Shenton Asia Pacific Fund |
| SAR | Stichting Architecten Research (Foundation for Architects' Research) |
| SARAA | South African Rheumatism and Arthritis Association |
| SARC | Syrian Arab Red Crescent |