- Love1
- Lunar eclipses1
- Magic4
- Magic squares1
- Manuscripts3
- Manuscripts, Medieval15
- Manuscripts, Renaissance1
- Manuscripts, Turkish1
- Markets2
- Mathematics, Medieval1
- Medical procedures & techniques1
- Medicine4
- Medicine, Medieval4
- Men1
- Merchants1
- Meteorology --Early works to 1800.1
- Name2
- Numerology1
- Parent and child1
- Phlebotomy1
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
