- Arabic language--Metrics and rhythmics1
- Arabic language--Semantics1
- Arabic language--Synonyms and antonyms1
- Arabic language--Versification1
- Arabs1
- Arbalet, Jean1
- Ardinghelli, Rinaldo degli1
- Argonauts (Greek mythology)1
- Aringhello, Tommaso di1
- Armada (1588)1
- Armaiolo, Puccino1
- Armaleoni, Benedetto degli1
- Armayūnī, Yūsuf ibn ʻAbd Allāh, -15511
- Armorial bookplates1
- Armorial stamps1
- Arrigo, Simone d'1
- Ashkenazi, Ẓevi Hirsch ben Jacob, -17181
- Astrology, Arab1
- Astronomical instruments1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah1