Encyclopedias, Almanacs, Transcripts, and Maps
- Sethos (ca. 12th century C.E.)
- Setna, Papyrus of
- Seton (or Sethon) Alexander (d. ca. 1604)
- Seven Principles (in Theosophy)
- Seven Stewards of Heaven
- Seventeenth-century Experimental and Theoretical Advances Regarding the Nature of Light Lay the Foundations of Modern Optics
- Seventh Son
- Severe Acute Respiratory Syndrome (SARS)
- Severe Acute Respiratory Syndrome (SARS)
- Severus Sebokht
- Sewage Treatment
- Sewage Treatment
- Sewall Wright
- Sex and Gender
- Sex Change
- Sex Change
- Sex Determination
- Sex Magic
- Sex Selection
- Sexism