Encyclopedias, Almanacs, Transcripts, and Maps
- American Standard Code for Information Interchange
- American Tailed Caecilians: Rhinatrematidae
- American Type Culture Collection
- American Vinland Association
- American Yoga Association
- American Zen College
- Amero-Australian Treefrogs: Hylidae
- Ames, Bruce N. (1928- )
- Amiante
- Amides
- Amides
- Amino Acid Chemistry
- Ammonification
- Ammonification
- Ammonius Hermiae
- Ammonius Saccus
- Amniomancy
- Amorah Quan Yin (1950-)
- Amoymon
- Amphionids: Amphionidacea