Thema – the subject category scheme for a global book trade

  1. Udaipur
  2. Udine
  3. UFOs & extraterrestrial beings
  4. Uganda
  5. Ukraine
  6. Ukrainian
  7. Ulster
  8. Ulster Scots (Ullans)
  9. Uluru & The Outback
  10. Umbria
  11. Umeå
  12. Underwater (sub-aqua) swimming
  13. Underwater archaeology
  14. Unexplained phenomena / the paranormal
  15. Ungava Bay
  16. Unified Modeling Language (UML)
  17. United Arab Emirates
  18. United Kingdom, Great Britain
  19. United Nations
  20. United States of America, USA
  21. Upper Austria
  22. Upper Bavaria
  23. Upper Lusatia
  24. Uppland
  25. Uppsala
  26. Ural mountains
  27. Ural-Altaic & Hyperborean languages
  28. Uranus
  29. Urban & municipal planning
  30. Urban communities
  31. Urban economics
  32. Urban fantasy
  33. Urban farming / urban agriculture
  34. Urban rail transit systems
  35. Urdu
  36. Uri
  37. Urology & urogenital medicine
  38. Uruguay
  39. Uruguay: East
  40. Uruguay: North
  41. Uruguay: North West
  42. Uruguay: South West
  43. Uruguay: Southern central
  44. US Independence Day
  45. US Midwest
  46. US Midwest: East North Central (Great Lakes) States
  47. US Midwest: West North Central (Great Plains) States
  48. US Northeast
  49. US Northeast: Mid-Atlantic States
  50. US Northeast: New England
  51. US Pacific Northwest
  52. US South
  53. US South: East South Central States
  54. US South: South Atlantic States
  55. US South: West South Central States
  56. US West
  57. US West: Mountain States
  58. US West: Pacific States
  59. USA: Colonization and Settlement ( c 1600 to c 1775)
  60. USA: Era of Civil Rights Movement (c 1954 to c 1968)
  61. USA: Exploration and Expansion (c 1800 to c 1861)
  62. USA: Korean War period (1950–1953)
  63. USA: The Gilded Age (c 1877 to c 1893)
  64. USA: The Great Depression (1929–1939)
  65. USA: The Jazz Age (1919–1929)
  66. USA: The New Nation (c 1783 to c 1800)
  67. USA: The Progressive Era (c 1890 to c 1929)
  68. USA: Vietnam War period (c 1955 to c 1975)
  69. Usage & grammar guides
  70. User interface design & usability
  71. Ushuaia
  72. Ussel
  73. USSR, Soviet Union
  74. Usti nad Labem Region
  75. Utah
  76. Utilities & tools
  77. Uto-Aztecan languages
  78. Utrecht
  79. Utrecht (province)
  80. Uttar Pradesh
  81. Uttarakhand
  82. Uzbek
  83. Uzbekistan