- Asceticism--Hinduism2
- Asceticism--Islam1
- Asharites1
- Ashbāh wa-al-naẓāʼir (Ibn Nujaym, Zayn al-Dīn ibn Ibrāhīm)2
- Ashkenazi, Ẓevi Hirsch ben Jacob, -17181
- Asia2
- Asia--Ganges River2
- Assumption of the Blessed Virgin Mary1
- Assyrian Church of the East1
- Astarābādhī, Muḥammad ibn ʻAlī, -1618 or 1619. Manhaj al-maqāl fī taḥqīq aḥwāl al-rijāl2
- Astarābādī, al-Ḥasan ibn Muḥammad, d. 1315. Wāfīyah fī sharḥ al-Kāfīyah2
- Astrolabes28
- Astrology25
- Astrology, Arab24
- Astrology, Iranian3
- Astrology, Roman1
- Astrology--Religious aspects1
- Astrometeorology2
- Astronomical instruments13
- Astronomical literature2