Encyclopedias, Almanacs, Transcripts, and Maps
- Arlington House, The Robert E. Lee Memorial
- Arlington Memorial Bridge
- Armagnacs and Burgundians
- Armey, Dick
- Armistead, George
- Armistice Day
- Armoni
- armonica
- arms, coat of
- Arms, John Taylor
- Army, United States Department of the
- armyworm
- Arnaud, Henri
- Arnauld
- Arndt, Ernst Moritz
- Arnim, Mary Annette (Beauchamp), Countess von
- Arnold, Eve
- Arnoldson, Klas Pontus
- Arod
- Aroe Islands