| Safari Tech Books Online | |
| Sage eReference | |
| Salud en Espanol | |
| San Francisco Chronicle (1865-1922) | |
| Science | |
| Science & Technology Collection (1900-) | |
| Science Citation Index (1955-) | |
| ScienceDirect | |
| Scientific American Archive Online (1993-) | |
| SciFinder (1907-) | |
| Scirus | |
| Scopus | |
| Scribner Writers Series | |
| Serials Directory | |
| Seventeenth and eighteenth century Burney Collection newspaper | |
| SIAM Journals Online (1997-) | |
| Small Business Resource Center | |
| Smithsonian Global Sound | |
| Social Explorer (1790-) | |
| Social Science Research Network | |
| Social Sciences Citation Index (1955-) | |
| Social Sciences Databases (ProQuest Only) | |
| Social Sciences Full Text | |
| Social Work Abstracts | |
| SocINDEX with Full Text (1895-) | |
| South Carolina Gazette (1732-1751) | |
| SPIE Digital Library | |
| SPORTDiscus with Full Text (1800-) | |
| SpringerLink | |
| SRDS Media Solutions | |
| Standard & Poor's NetAdvantage | |
| Statistical Insight | |
| STATRef | |
| Studies on Women & Gender Abstracts (1995-) | |
| Synthesis Digital Library of Engineering and Computer Science | |
