- Absolution1
- Abū Yūsuf Yaʻqūb, 731 or 732-7981
- Abū al-Layth al-Samarqandī, Naṣr ibn Muḥammad, -983? Muqaddimah1
- Account books1
- Acquittals1
- Administration1
- Afghanistan1
- Agamemnon, King of Mycenae (Mythological character)1
- Agreda, Dominici d'1
- Agriculture--Accounting1
- Agriculture--Economic aspects1
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)1
- Al-Munajjim al-Kashi, Yahya ibn Imad bin Yahya1
- Albertus de Fontanella1
- Aldobrandini, Giovanni degli1
- Alessandri, Alessandro degli1
- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alexander, the Great, 356 B.C.-323 B.C.1
- Alfonso V, King of Aragon, 1396-14581