Encyclopedias, Almanacs, Transcripts, and Maps
- Australian UFO Bulletin
- Australian Warblers: Acanthizidae
- Australo-American Side-Necked Turtles: Chelidae
- Austromancy
- Authority in Religious Traditions
- Autoexperimentation
- Autography
- Autoimmunity and Autoimmune Disorders
- Autologous Banking
- Autolycus of Pitane
- Automated Fingerprint Identification System (AFIS)
- Automatic Drawing and Painting
- Automatic pilot
- Automatic Pilot
- Automatic Speaking
- Automobile Accidents
- Autonomic Dysfunction
- Autonomous Technology
- Autorad
- Autoscope