Encyclopedias, Almanacs, Transcripts, and Maps
- Antonio Cabezón
- Antonov Uprising
- Anzio, Battle of
- Apex Hosiery Co. v. Leader
- Apocalypticism
- Apolinario Mabini
- Apollinaire, Guillaume (Wilhelm Apollinaris de Kostrowitzky; 1880–1918)
- Apollo Theater
- Apolo Milton Obote
- Aponte, José Antonio
- Apothecaries
- Appanage Era
- Appendices
- Applebee, Constance
- Appomattox Courthouse
- April Theses
- Arab Republic of Egypt
- Arabia, Western Economic Expansion in
- Aragon, Louis (1897–1982)
- Arber, Agnes