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				The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- History of civil rights in the United States (7 members)
 - History of science (2 members)
 - History user templates (3 members)
 - Homeless people (1 member)
 - Hong Kong (1 member)
 - Human rights (1 member)
 - Hungary location map templates (1 member)
 - Hunger (1 member)
 - Hydroelectric power stations in Ethiopia (1 member)
 - Hydroelectric power stations in Nigeria (1 member)
 - Hymns (2 members)
 - IPA language templates (2 members)
 - ISO 3166 (2 members)
 - Ill-formatted IPAc-en transclusions (1 member)
 - Ill-formatted infobox-language images (3 members)
 - Image processing (1 member)
 - Image with comment templates (2 members)
 - Imported vocabulary (8 members)
 - In-jokes (2 members)
 - Inaction (1 member)
 - Incomplete translations (1 member)
 - Indian Ocean (1 member)
 - Indian authors (1 member)
 - Indigenous peoples treaties (5 members)
 - Indologists (2 members)
 - Infobox book image param needs updating (3 members)
 - Infobox templates (28 members)
 - Infobox templates with module parameter (1 member)
 - Inline cleanup templates (1 member)
 - Inscriptions (2 members)
 - Intellectual property treaties (1 member)
 - Interlingue (1 member)
 - Internal link maintenance templates (1 member)
 - Internal link templates (25 members)
 - International Law Commission officials (1 member)
 - International Olympic Committee country alias templates (213 members)
 - International flags (1 member)
 - International organization language templates (1 member)
 - International sports navbox templates (2 members)
 - Interstitial television shows (1 member)
 - Interwiki link templates (4 members)
 - Intricate templates (3 members)
 - Irrigation (1 member)
 - Islam (1 member)
 - Islam and antisemitism (1 member)
 - Islam templates (1 member)
 - Islamic scholars (1 member)
 - Islamic studies scholars (1 member)
 - Islands of Africa (1 member)
 - Italian-speaking countries (2 members)