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The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 250 | next 250) (20 | 50 | 100 | 250 | 500)- 1847 births (1 member)
- 1927 births (1 member)
- 1931 deaths (1 member)
- 19th-century American businesspeople (1 member)
- 19th-century inventors (1 member)
- 2013 deaths (1 member)
- 20th-century American businesspeople (1 member)
- 20th-century American scientists (1 member)
- 20th-century astronomers (1 member)
- 20th-century inventors (1 member)
- 21st-century American scientists (1 member)
- 21st-century astronomers (1 member)
- Aether (533 members)
- Aether theories (1 member)
- All Wikipedia articles written in American English (1 member)
- All articles that may contain original research (1 member)
- All articles with dead external links (1 member)
- All articles with unsourced statements (1 member)
- American (3 members)
- American astronomers (1 member)
- American atheists (1 member)
- American chief executives (1 member)
- American deists (1 member)
- American electrical engineers (1 member)
- American film production company founders (1 member)
- American film studio executives (1 member)
- American inventions (1 member)
- American inventors (1 member)
- American manufacturing businesspeople (1 member)
- American patent holders (1 member)
- American people of Canadian descent (1 member)
- American people of Dutch descent (1 member)
- American people of English descent (1 member)
- American people of Scottish descent (1 member)
- American telecommunications engineers (1 member)
- Articles containing unknown ISO 639 language template (1 member)
- Articles containing video clips (1 member)
- Articles that link to Wikisource (1 member)
- Articles that link to foreign-language Wikisources (1 member)
- Articles that may contain original research from December 2016 (1 member)
- Articles with Encyclopædia Britannica links (1 member)
- Articles with Internet Archive links (2 members)
- Articles with Project Gutenberg links (1 member)
- Articles with dead external links from June 2017 (1 member)
- Articles with example code (1 member)
- Articles with hCards (39 members)
- Articles with invalid date parameter in template (3 members)
- Articles with permanently dead external links (1 member)
- Articles with unsourced statements from December 2017 (1 member)
- Articles with unsourced statements from July 2017 (1 member)
- Articles with unsourced statements from October 2014 (1 member)
- Battery inventors (1 member)