The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- .NET (4 members)
- ActionScript (2 members)
- Add-ons (4 members)
- Administration of this site (7 members)
- Algorithm (1 member)
- Algorithms (13 members)
- Anastasia Movie Spoofs (1 member)
- Anastasia Movies (1 member)
- Apple (1 member)
- Applications (14 members)
- Article stubs (146 members)
- BASIC (5 members)
- BASIC dialects (4 members)
- Beauty and the Beast: The Enchanted Christmas Movie Spoofs (1 member)
- Beauty and the Beast Movie Spoofs (1 member)
- Beauty and the Beast Movies (1 member)
- Best practices (1 member)
- BlogListingPage (0 members)
- Blog posts (5 members)
- Browse (30 members)
- Browser plug-ins (1 member)
- C (10 members)
- C++ (7 members)
- C++ stubs (1 member)
- C/stdio.h (6 members)
- CC-BY-SA files (1 member)
- CC-BY files (1 member)
- CC-SA files (1 member)
- CSS (1 member)
- C Sharp (3 members)
- C Sharp stubs (1 member)
- C languages (0 members)
- C program (1 member)
- C stdio.h (0 members)
- C stub (0 members)
- C stubs (3 members)
- Candidates for deletion (3 members)
- Candidates for exportation (1 member)
- Class-based programming languages (10 members)
- Cleanup (1 member)
- Client-side scripting (2 members)
- Client-side scripting languages (2 members)
- Client software (2 members)
- Code (11 members)
- Code example stubs (7 members)
- Code soft redirects (42 members)
- Command-line interfaces (4 members)
- Command-line interpreters (2 members)
- Commands (3 members)
- Community (5 members)