The following categories exist in the wiki.

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  1. Operating Systems ‎(38 members)
  2. Fruits and Vegetables ‎(37 members)
  3. Diet & Nutrition ‎(36 members)
  4. Psychology ‎(34 members)
  5. 2012 Gubernatorial Elections ‎(33 members)
  6. Buddhism ‎(33 members)
  7. Judaism ‎(33 members)
  8. Rock Bands ‎(33 members)
  9. Health Insurance ‎(32 members)
  10. Famous Personalities ‎(32 members)
  11. Pets ‎(32 members)
  12. Medicine ‎(31 members)
  13. Cellular Biology ‎(31 members)
  14. Computer Hardware ‎(31 members)
  15. Geography ‎(30 members)
  16. Marine Life ‎(30 members)
  17. Geology ‎(29 members)
  18. Recreation ‎(29 members)
  19. Fitness ‎(29 members)
  20. Television ‎(29 members)
  21. Programming ‎(29 members)
  22. Botany ‎(28 members)
  23. People ‎(28 members)
  24. Telecommunications ‎(28 members)
  25. Microbiology ‎(28 members)
  26. U.S. Politics ‎(28 members)
  27. Basketball ‎(28 members)
  28. Countries ‎(27 members)
  29. Diagnostics ‎(25 members)
  30. Tennis ‎(25 members)
  31. Hinduism ‎(24 members)
  32. Tablets ‎(23 members)
  33. Cosmetology ‎(23 members)
  34. Weather ‎(23 members)
  35. 2010 Gubernatorial Elections ‎(23 members)
  36. Nutrition ‎(23 members)
  37. Gaming ‎(22 members)
  38. Actors ‎(21 members)
  39. Festivals ‎(21 members)
  40. Philosophy ‎(20 members)
  41. Alcoholic Beverages ‎(20 members)
  42. Musicians ‎(20 members)
  43. Baby ‎(20 members)
  44. Computer Networking ‎(20 members)
  45. Zoology ‎(20 members)
  46. Accounting ‎(20 members)
  47. Movies ‎(19 members)
  48. Organizations ‎(19 members)
  49. Aircraft ‎(19 members)
  50. Professions ‎(19 members)

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