The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Technology (98 members)
- Template (40 members)
- Template documentation (177 members)
- Template invoked modules (28 members)
- Templates (1 member)
- Templates imported from Wikipedia (60 members)
- Templates without documentation (0 members)
- Transclusion Pages (4 members)
- Translation templates (1 member)
- Turret (7 members)
- Typing-aid templates (13 members)
- Under-construction templates (1 member)
- Unused modules (5 members)
- Upgrade (20 members)
- UpgradeInfo Pages (18 members)
- Utility templates (15 members)
- Water Pumping Facility (1 member)
- Wiki Information (5 members)
- Wiki maintenance (8 members)
- Work in progress (10 members)