Encyclopedias, Almanacs, Transcripts, and Maps
- Sorokin, Pitirim Aleksandrovich
- Sorption
- Sorskii, Nil
- Soteriology
- Soul: Ancient near Eastern Concepts
- Soul: Buddhist Concepts
- Soul: Chinese Concepts
- Soul: Christian Concepts
- Soul: Concepts in Indigenous Religions
- Soul: Greek and Hellenistic Concepts
- Soul: Indian Concepts
- Soul: Islamic Concepts
- Soul: Jewish Concept
- Source Separation
- South African leaders
- South American Indian Religions
- South American Indian Religions: An Overview
- South American Indian Religions: History of Study
- South American Indian Religions: Mythic Themes
- South American Indians