The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Revision (30 members)
- Rhode Island (2 members)
- Road Type (11 members)
- Road Type templates (24 members)
- Road types and names (0 members)
- Runway/Taxiway (1 member)
- Sample responses (14 members)
- Script Subpage (49 members)
- Search (2 members)
- Search templates (2 members)
- Segment (4 members)
- South Carolina (1 member)
- South Dakota (1 member)
- Southeast (1 member)
- Street (1 member)
- String manipulation templates (2 members)
- Style guides (58 members)
- Sv (0 members)
- Sv-0 (0 members)
- TW (0 members)