- Achilles (Greek mythology)1
- Acne1
- Acorns1
- Acorns as food1
- Acquired5
- Acrobatics--Early works to 1800.1
- Acrobats13
- Acrostics1
- Acrostics.3
- Actaeon (Greek mythology)1
- Acting2
- Acting --Poetry1
- Action photography1
- Actions & defenses2
- Activists1
- Actors186
- Actors --Biography1
- Actors --France10
- Actors --United States1
- Actors and actresses6
Libraries & Collections
- Arts Library
- Bass Library
- Beinecke Library
- Classics Library
- Divinity Library
- Film Study Center
- Fortunoff Archive
- Humanities Collections
- International Collections
- Law Library
- Lewis Walpole Library
- Library Collection Services
- Manuscripts & Archives
- Map Collection
- Marx Science & Social Science Library
- Medical Library
- Music Library
- Sterling Library
- Yale Center for British Art
