Parentless Concepts
- adventure
- Academia Norica
- accepted manuscript
- Acta publica (Österreichische Lorbeercrantz)
- action
- Adagia Arabica
- Adam Reusner, Jerusalem
- ADAT
- Adelboldus Traiectensis
- Adelboldus Traiectensis, Vita imperatoris Henrici II
- Adolphus
- Adult Education / Higher Education
- Aegean Sea
- Aelius Everardus Vorstius
- Aesop
- Africa
- Agathias
- Ägidius Tschudi, Schweizerische Chronica
- Agostino Morosini
- Ahmed Bican Yazıcıoğlu
- Ahmed Bican Yazıcıoğlu, ʿAǧāʾib el-Maḫlūqāt
- aif
- al-Arbaʿa al-anāǧīl al-muqaddasa [Quatuor Arabica Evangelia]
- al-Farabi
- al-Ghazali