Encyclopedias, Almanacs, Transcripts, and Maps
- Arnold, Sir Malcolm
- Arrhenius, Svante August (1859 – 1927) Swedish Chemist and Physicist
- Arsenic-Treated Lumber
- Art and Religion
- Articulata (Articulate Lampshells)
- Artiodactyla (continued)
- Artiodactyla (Even-Toed Ungulates)
- Arval Brothers
- Asa?ga
- Asbestos Removal
- Ascension Day
- Ascidiacea (Sea Squirts)
- Ash?ar?, Al-
- Ash?ar?yah
- Asher ben Ye?i?el
- Ashes, The
- Ashi
- Ashio, Japan
- Ashkenazic Hasidism
- Ashram