Encyclopedias, Almanacs, Transcripts, and Maps
- Simonides of Ceos
- Simons, Walter
- simoom
- simple harmonic motion
- Simpson, Matthew
- Simpson, Sir George
- Simpson, Wallis Warfield
- Simpson-Miller, Portia
- Simri
- Sims, Christopher Albert
- Sims, James Marion
- Simsbury
- Sinabung, Mount
- Sinai campaign
- Sinanthropus pekinensis
- Sinclair, Sir John
- Singanallur
- Singh, Manmohan
- Singh, Vijay
- Singhalese