Categories

The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• X-ray instrumentation‏‎ (10 members)
• X-ray telescopes‏‎ (24 members)
• X-rays‏‎ (39 members)
• XML-based standards‏‎ (7 members)
• Xanthenes‏‎ (1 member)
• Xanthines‏‎ (24 members)
• Xenon‏‎ (5 members)
• Xenon compounds‏‎ (8 members)
• Xinjiang‏‎ (1 member)
• Yahoo!‏‎ (1 member)
• Yale School of Medicine‏‎ (1 member)
• Yale University‏‎ (1 member)
• Yale University alumni‏‎ (7 members)
• Yale University faculty‏‎ (4 members)
• Yale University schools‏‎ (3 members)
• Yangon‏‎ (1 member)
• Year of birth missing‏‎ (343 members)
• Year of birth missing (living people)‏‎ (30 members)
• Year of birth unknown‏‎ (9 members)
• Year of death missing‏‎ (19 members)
• Year of death unknown‏‎ (4 members)
• Year of television program debut missing‏‎ (1 member)
• Yeast extract spreads‏‎ (1 member)
• Yeast stubs‏‎ (28 members)
• Yeasts‏‎ (45 members)
• Yeshiva University‏‎ (1 member)
• Yeshiva University alumni‏‎ (1 member)
• Yeshiva University faculty‏‎ (2 members)
• Yeshiva University rosh yeshivas‏‎ (1 member)
• Yiddish‏‎ (1 member)
• Yishun‏‎ (1 member)
• Yoga‏‎ (7 members)
• Yoga positions‏‎ (1 member)
• Yoga styles‏‎ (1 member)
• Yoghurts‏‎ (0 members)
• Yolo County, California‏‎ (1 member)
• York‏‎ (1 member)
• York County, South Carolina‏‎ (1 member)
• York Region, Ontario‏‎ (1 member)
• York University faculty‏‎ (2 members)
• Yorkshire‏‎ (1 member)
• Young adult‏‎ (2 members)
• Young adult novels‏‎ (1 member)
• Youngstown State University‏‎ (2 members)
• Youth‏‎ (14 members)
• Youth-led organizations‏‎ (1 member)
• Youth development organizations‏‎ (4 members)
• Youth empowerment organizations‏‎ (1 member)
• Youth organisations based in Singapore‏‎ (2 members)
• Youth organizations based in the United States‏‎ (1 member)