Parentless Concepts
- attachment
- Athanasius of Alexandria
- Athanasius of Alexandria, Vita S. Antonii eremitae a D. Athanasio Graece scripta, cum Davidis Hoeschelii interpretatione ac notis
- Athenaeus
- Athens
- atlas
- au
- Aubry, Johann
- audiocassette
- Augsburg
- Augustana Bibliotheca
- Augustine
- Augustus
- Aulic Chamber
- Austria
- Austrian Academy of Sciences
- Austrian Exchange Service
- Austrian Research Foundation
- Austrian Research Promotion Agency
- Austrian Science Fund (FWF)
- author's original
- Avenzoar
- Averroes
- avi
- Avicenna