- Astrometeorology1
- Astronomy, Ancient1
- Astronomy, Medieval1
- Astronomy--Religious aspects1
- Astronomy--Religious aspects--Islam1
- Astronomy--Religious aspects--Jainism1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, d. 1265. Hidāyat al-ḥikmah1
- Atoms1
- Atonement1
- Atonement (Prayer)1
- Atonement (Prayer)--Hinduism1
- Austria1
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- Authors, Arab1
- Aveiro, Gabriel de Lencastre, Duque de, 1667-17451
- Avesta. Yasna1
- Avicenna, 980-10371
- Avicenna, 980-1037. Ishārāt wal-al-tanbīhāt1
- Avicenna, 980-1037. Qaṣīdah al-rūḥīyah1