Encyclopedias, Almanacs, Transcripts, and Maps
- Save the Whales
- Save-the-Redwoods League
- Savery, Thomas (1650–1715)
- sawfish
- scabious
- Scafell Pike
- Scaly-Tailed Squirrels (Anomaluridae)
- Scandentia (Tree Shrews)
- scanning
- Scaphopoda (Tusk Shells)
- scattering, particle
- Schelling, Friedrich
- Schenirer, Sarah
- Schimmel, Annemarie
- Schism: An Overview
- Schism: Christian Schism
- Schlegel, Friedrich
- Schleiermacher, Friedrich
- Schlesinger, Arthur Meier, Jr
- Schneerson, Menachem M.