Encyclopedias, Almanacs, Transcripts, and Maps
- Diego, Gerardo
- Diepenbeeck, Abraham van
- Dies, Martin, Jr.
- Dieskau, Ludwig August, Baron
- diethyltoluamide
- Dietikon
- Dietrich von Bern
- Diez, Friedrich Christian
- differential calculus
- differential geometry
- digallic acid
- Digby, George
- Digby, John
- Digby, Kenelm Henry
- Digger Indians
- digital art
- digital currency
- digital radio
- digital versatile disc
- digital-to-analog conversion