The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Audio (7 members)
- Authors (26 members)
- Autonomy (3 members)
- BSD (1 member)
- Bands (58 members)
- Bash (3 members)
- Biology (8 members)
- Bleeding Edge (2 members)
- Blinkenlights (29 members)
- Blinkensisters (7 members)
- Blog (1 member)
- Blogs (4 members)
- Body (1 member)
- Books (50 members)
- Bots (62 members)
- Boxes (45 members)
- Broken jargon pages (1 member)
- Buddhism (6 members)
- Buggy jargon pages (1 member)
- Bush (3 members)