- Abū al-Layth al-Samarqandī, Naṣr ibn Muḥammad, -983? Muqaddimah fī al-ṣalāh2
- Abū al-Saʻūd Muḥammad ibn Muḥammad, 1492 or 1493-1574 or 15752
- Abū ʻAmr ibn al-ʻAlāʼ, 689 or 690-770 or 7712
- Acquittals2
- Adam (Biblical figure)2
- Advisory opinions (Islamic law)2
- Africa2
- Agriculture--Economic aspects2
- Agriculture--Religious aspects--Hinduism2
- Alberto, Alberto di2
- Alessandri, Bartolomeo degli2
- Alessandri, Pietro degli2
- Alfonso X, King of Castile and Leon, 1221-12842
- Algeria--Hippo (Extinct city)2
- Almagest (Ptolemy)2
- Almanacs2
- Almucantar2
- Alphabet--Religious aspects--Hinduism2
- Alum tawed bindings2
- Amadori, Lorenzo2