The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Sub-Floors (0 members)
- Template documentation (0 members)
- Templates (0 members)
- Templates without documentation (0 members)
- Temporary Items (0 members)
- The Backdoor (0 members)
- The Hotel (0 members)
- The Mines (0 members)
- The Outdoors (0 members)
- The Rooms (0 members)
- The Three Architects (0 members)
- Timothy Worshipper (0 members)
- UGC (0 members)
- Unattributed files (0 members)
- Unconfirmed (0 members)
- Upcoming (0 members)
- Upcoming Content (0 members)
- Updates (0 members)
- Userboxes (0 members)
- Videos (0 members)
- Wiki skin images (0 members)