The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Main Characters (8 members)
- Major Stub Pages (2 members)
- Mark of the Saurian (14 members)
- Mathematical templates (3 members)
- Media (3 members)
- Media (BR25) (0 members)
- Media infoboxes (1 member)
- Mentioned-Only Characters (5 members)
- Misc. Citation templates (1 member)
- Misc. Templates (1 member)
- Navigational Infobox (13 members)
- New Chicago (1 member)
- Novels and Novellas (6 members)
- Olympiad (10 members)
- One-Shot Characters (43 members)
- Organizations (6 members)
- Pages using Tabber parser tag (231 members)
- Pages with broken file links (331 members)
- Pages with iFrames (1 member)
- ParserFunctions (1 member)
- Pictures of the Day (12 members)
- Places (17 members)
- Planet of the Amazon Women (13 members)
- Planet of the Slave Girls (147 members)
- Planet of the Slave Girls, Part II (1 member)
- Planet of the Slave Girs (1 member)
- Planets (13 members)
- Policy Templates (1 member)
- Preloads (1 member)
- Producers (2 members)
- Producers (TOS) (1 member)
- Props (1 member)
- RDM Broadcast Date Templates (1 member)
- RDM Release Date Templates (4 members)
- Races (1 member)
- Recurring Guest Characters (4 members)
- Reference templates (1 member)
- Requested Pages (1 member)
- Return of the Fighting 69th (18 members)
- Robots (4 members)
- Science (1 member)
- Screen captures (265 members)
- Screen captures (A Blast for Buck) (1 member)
- Screen captures (A Dream of Jennifer) (3 members)
- Screen captures (Ardala Returns) (1 member)
- Screen captures (Awakening) (111 members)
- Screen captures (BR25) (334 members)
- Screen captures (Buck's Duel to the Death) (2 members)
- Screen captures (Cosmic Whiz Kid) (2 members)
- Screen captures (Cruise Ship to the Stars) (1 member)