Encyclopedias, Almanacs, Transcripts, and Maps
- Smythies, J(ohn) R(aymond) (1922-)
- Snails
- Snails
- Snakeflies: Raphidioptera
- Snakeheads: Channoidei
- Snakes
- Snakes
- Snakes and Lizards: Squamata
- Snapdragon Family
- Snapdragon Family
- Snapping Turtles: Chelydridae
- Snow Blooms
- Snowball the Cat
- Snowdon, Ruth J(ohnson) (1896-?)
- Soal, S(amuel) G(eorge) (1889-1975)
- Soaps and Detergents
- Sobriety Testing
- Social Construction of Scientific Knowledge
- Social Construction of Technology
- Social Contract for Science