Encyclopedias, Almanacs, Transcripts, and Maps
- Southfield
- Southgate
- Southington
- Sovern, Michael Ira
- Soviet Far East
- Soya Strait
- Soyer, Alexis Benoît
- Sozzini, Fausto
- Sozzini, Lelio
- space biology
- Space Infrared Telescope Facility
- space law
- space medicine
- space science
- Space Transportation System
- Spada, Lionello
- spadefish
- Spagna, Lo
- Spagnoletto, Lo
- Spahn, Warren Edward