- Stoics1
- Strozzi, Giovanni1
- Strozzi, Nanni, 1376-14271
- Sudan--Kordofan (Province)1
- Sufi poetry, Turkish1
- Sufis--Biography1
- Suhrawardī, ʻUmar ibn Muḥammad, 1145-1234. ʻAwārif al-maʻārif1
- Sullam al-ʻulūm (Bahārī, Muḥibb Allāh ibn ʻAbd al-Shakūr)1
- Sultans1
- Summa theologica (Thomas, Aquinas, Saint)1
- Sumtī, Yūsuf ibn Khālid1
- Sun worship1
- Sunan (Abū Dāʼūd Sulaymān ibn al-Ashʻath al-Sijistānī)1
- Sunan (Ibn Mājah, Muḥammad ibn Yazīd)1
- Sunan al-kubrá (Bayhaqī, Aḥmad ibn al-Ḥusayn)1
- Sunnites--Controversial literature1
- Superstition1
- Surgery1
- Surgical instruments and apparatus1
- Suyūṭī, 1445-1505. Farīdah fī al-taṣrīf1