The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Agencies (1 member)
- Alien Images (2 members)
- Army Officers (3 members)
- Award Images (3 members)
- Blog posts (1 member)
- Browse (7 members)
- Candidates for deletion (0 members)
- Celestial Regions (1 member)
- Dates (1 member)
- Disambiguations (1 member)
- General Categories (9 members)
- Group Images (3 members)
- Help (0 members)
- Husnock Branches (2 members)
- Images (12 members)
- Individuals (4 members)
- Laws (4 members)
- Military Awards (1 member)
- Military Conflicts (1 member)
- Military Officers (10 members)
- Military Ranks (8 members)
- Military Terms (5 members)
- Military Titles (1 member)
- Military Uniforms (7 members)
- Miscellaneous Images (1 member)
- Navy Officers (4 members)
- Orders (1 member)
- Organizations (2 members)
- People Images (13 members)
- Place Images (1 member)
- Planet Images (1 member)
- Planets (3 members)
- Politicians (1 member)
- Positions (2 members)
- Rank Insignia (11 members)
- Resolutions (2 members)
- Sensors (1 member)
- Service Officers (2 members)
- Ship Images (2 members)
- Space (2 members)
- Space Facilities (1 member)
- Space Images (2 members)
- Species (3 members)
- Star Systems (1 member)
- Technology (3 members)
- Technology Images (2 members)
- Template documentation (28 members)
- Templates (31 members)
- Videos (2 members)