Encyclopedias, Almanacs, Transcripts, and Maps
- Irritable Bowel Syndrome
- Irritable Bowel Syndrome Diet
- Irving S. Cooper
- Irving, Rev. Edward (1792-1834)
- Irwin Shapiro
- Irwin, H(arvey) J(on) (1943-)
- Is There a Hidden Code in the Bible?
- Isaac Barrow
- Isaac Beeckman
- Isaac Greenwood
- Isaac Merrit Singer
- Isaac Newton
- Isaac Newton's Principia Mathematica Greatly Influences the Scientific World and the Society Beyond It
- Isaac of Holland (fl. fifteenth century)
- Isaac Ray
- Isaacus Vossius
- Isabela Godin des Odonnais
- Ishaq ibn Hunayn
- Isian News
- Isidorius of Miletus