- Astronomical instruments32
- Astronomy23
- Astronomy, Arab191
- Astronomy, Medieval3
- Astronomy--Religious aspects--Islam1
- Aswānī, ʻUthmān ibn Saʻd Allāh, active 19th century. Risālat al-ikhwān1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah51
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah. Qism al-Ṭabīʻī wa-al-ilāhī2
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, d. 1265. Hidāyat al-ḥikmah5
- Atlases1
- Atoms1
- Aurangzeb, Emperor of Hindustan, 1618-17071
- Austria1
- Authority--Religious aspects2
- Authority--Religious aspects--Islam1
- Authors, Arab2
- Autographs568
- Avicenna, 980-10372
- Avicenna, 980-1037. Ishārāt wal-al-tanbīhāt2
- Avicenna, 980-1037. Qaṣidah rūḥānīyah1