| Abbreviation | Definition |
|---|---|
| SAMMIE | Southwest Area Multicounty Multitype Interlibrary Exchange |
| SAMUEL | Scripture And Memory A Universal Ecumenical Library |
| SANL | South Africa National Library |
| SAPL | San Antonio Public Library |
| SAPL | Santa Ana Public Library |
| SAPL | St Albert Public Library |
| SARL | Spencer Art Reference Library |
| SASL | Scriptable Avionics Simulation Library |
| SASL | System Application Support Libraries |
| SASL | System Architecture Support Libraries |
| SASOL | Senate Advisory Subcommittee On the Library |
| SBCFL | San Benito County Free Library |
| SBL | Shelby Township Public Library |
| SBL | Structural Bioinformatics Library |
| SBLD | Structure Based Library Design |
| SBRL | Smyth Bland Regional Library |
| ScAm | Scientific American |
| ScAm | Scientific American (serial publication) |
| ScandJWorkEnvironHealth | Scandinavian Journal of Work, Environment and Health (Helsinki) |
| SCCL | Santa Clara City Library |