Categories
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The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Animals (40 members)
- Antarctica (392 members)
- Anthropocene (1,137 members)
- Anti-Hazing (1 member)
- Anti-Sweatshop (34 members)
- Antigua and Barbuda (19 members)
- Appropriate Technology (39 members)
- Aquifers (169 members)
- Arctic (482 members)
- Argentina (3 members)
- Arizona (40 members)
- Arizona State Univ. (0 members)
- Arizona State University (5 members)
- Arkansas (10 members)
- Armenia (3 members)
- Ashland (13 members)
- Asia (55 members)
- Astrobiology (21 members)
- Asunción (1 member)
- Atmosphere (186 members)