- Affinity (Canon law)1
- Agriculture2
- Agriculture--Early works to 18001
- Aircraft accidents1
- Alchemy40
- Alchemy -- Early works to 18002
- Alchemy --Early works to 18007
- Alchemy --Early works to 1800 1
- Alchemy--Early works to 18007
- Alchemy--Early works to 1800.1
- Alchemy--England1
- Alchemy.2
- Allegorical interpretations1
- Allegories2
- Allegory4
- Almshouses3
- Alphabet1
- Alphabet books2
- Alphabets --Early works to 18001
- Altars2
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
