[
  {
    "name": "General Works",
    "short": "A",
    "query": "A*",
    "children": [
      {
        "name": "Collections. Series. Collected works",
        "short": "AC",
        "query": "AC*",
        "count": 21960
      },
      {
        "name": "Encyclopedias",
        "short": "AE",
        "query": "AE*",
        "count": 2260
      },
      {
        "name": "Dictionaries and other general reference works",
        "short": "AG",
        "query": "AG*",
        "count": 3721
      },
      {
        "name": "Indexes",
        "short": "AI",
        "query": "AI*",
        "count": 332
      },
      {
        "name": "Museums. Collectors and collecting",
        "short": "AM",
        "query": "AM*",
        "count": 4862
      },
      {
        "name": "Newspapers",
        "short": "AN",
        "query": "AN*",
        "count": 25
      },
      {
        "name": "Periodicals",
        "short": "AP",
        "query": "AP*",
        "count": 4180
      },
      {
        "name": "Academies and learned societies",
        "short": "AS",
        "query": "AS*",
        "count": 17666
      },
      {
        "name": "Yearbooks. Almanacs. Directories",
        "short": "AY",
        "query": "AY*",
        "count": 646
      },
      {
        "name": "History of scholarship and learning. The humanities",
        "short": "AZ",
        "query": "AZ*",
        "count": 1660
      }
    ],
    "count": 57390
  },
  {
    "name": "Philosophy. Psychology. Religion",
    "short": "B",
    "query": "B*",
    "children": [
      {
        "name": "Philosophy (General)",
        "short": "B",
        "query": "B--*",
        "count": 88382
      },
      {
        "name": "Logic",
        "short": "BC",
        "query": "BC*",
        "count": 4484
      },
      {
        "name": "Speculative philosophy",
        "short": "BD",
        "query": "BD*",
        "count": 17392
      },
      {
        "name": "Psychology",
        "short": "BF",
        "query": "BF*",
        "count": 81830
      },
      {
        "name": "Aesthetics",
        "short": "BH",
        "query": "BH*",
        "count": 5223
      },
      {
        "name": "Ethics",
        "short": "BJ",
        "query": "BJ*",
        "count": 23833
      },
      {
        "name": "Religions. Mythology. Rationalism",
        "short": "BL",
        "query": "BL*",
        "count": 68643
      },
      {
        "name": "Judaism",
        "short": "BM",
        "query": "BM*",
        "count": 48730
      },
      {
        "name": "Islam. Bahaism. Theosophy, etc.",
        "short": "BP",
        "query": "BP*",
        "count": 51753
      },
      {
        "name": "Buddhism",
        "short": "BQ",
        "query": "BQ*",
        "count": 24951
      },
      {
        "name": "Christianity",
        "short": "BR",
        "query": "BR*",
        "count": 44414
      },
      {
        "name": "The Bible",
        "short": "BS",
        "query": "BS*",
        "count": 65522
      },
      {
        "name": "Doctrinal theology",
        "short": "BT",
        "query": "BT*",
        "count": 43865
      },
      {
        "name": "Practical Theology",
        "short": "BV",
        "query": "BV*",
        "count": 75533
      },
      {
        "name": "Christian Denominations",
        "short": "BX",
        "query": "BX*",
        "count": 139720
      }
    ],
    "count": 779214
  },
  {
    "name": "Auxiliary Sciences of History",
    "short": "C",
    "query": "C*",
    "children": [
      {
        "name": "Auxiliary Sciences of History",
        "short": "C",
        "query": "C--*",
        "count": 114
      },
      {
        "name": "History of Civilization",
        "short": "CB",
        "query": "CB*",
        "count": 11227
      },
      {
        "name": "Archaeology",
        "short": "CC",
        "query": "CC*",
        "count": 4745
      },
      {
        "name": "Diplomatics. Archives. Seals",
        "short": "CD",
        "query": "CD*",
        "count": 11162
      },
      {
        "name": "Technical Chronology. Calendar",
        "short": "CE",
        "query": "CE*",
        "count": 1163
      },
      {
        "name": "Numismatics",
        "short": "CJ",
        "query": "CJ*",
        "count": 7459
      },
      {
        "name": "Inscriptions. Epigraphy",
        "short": "CN",
        "query": "CN*",
        "count": 2043
      },
      {
        "name": "Heraldry",
        "short": "CR",
        "query": "CR*",
        "count": 5230
      },
      {
        "name": "Genealogy",
        "short": "CS",
        "query": "CS*",
        "count": 56240
      },
      {
        "name": "Biography",
        "short": "CT",
        "query": "CT*",
        "count": 27161
      }
    ],
    "count": 165974
  },
  {
    "name": "World History and History of Europe, Asia, Africa, Australia, New Zealand, etc.",
    "short": "D",
    "query": "D*",
    "children": [
      {
        "name": "History (General)",
        "short": "D",
        "query": "D--*",
        "count": 120740
      },
      {
        "name": "Great Britain",
        "short": "DA",
        "query": "DA*",
        "count": 66849
      },
      {
        "name": "Central Europe",
        "short": "DAW",
        "query": "DAW*",
        "count": 287
      },
      {
        "name": "Austria – Liechtenstein – Hungary – Czechoslovakia",
        "short": "DB",
        "query": "DB*",
        "count": 26333
      },
      {
        "name": "France – Andorra – Monaco",
        "short": "DC",
        "query": "DC*",
        "count": 52275
      },
      {
        "name": "Germany",
        "short": "DD",
        "query": "DD*",
        "count": 49421
      },
      {
        "name": "Greco-Roman World",
        "short": "DE",
        "query": "DE*",
        "count": 1969
      },
      {
        "name": "Greece",
        "short": "DF",
        "query": "DF*",
        "count": 12548
      },
      {
        "name": "Italy – Malta",
        "short": "DG",
        "query": "DG*",
        "count": 43272
      },
      {
        "name": "Low Countries – Benelux Countries",
        "short": "DH",
        "query": "DH*",
        "count": 4933
      },
      {
        "name": "Netherlands (Holland)",
        "short": "DJ",
        "query": "DJ*",
        "count": 7544
      },
      {
        "name": "Eastern Europe (General)",
        "short": "DJK",
        "query": "DJK*",
        "count": 2506
      },
      {
        "name": "Russia. Soviet Union. Former Soviet Republics – Poland",
        "short": "DK",
        "query": "DK*",
        "count": 91135
      },
      {
        "name": "Northern Europe. Scandinavia",
        "short": "DL",
        "query": "DL*",
        "count": 15540
      },
      {
        "name": "Spain – Portugal",
        "short": "DP",
        "query": "DP*",
        "count": 37978
      },
      {
        "name": "Switzerland",
        "short": "DQ",
        "query": "DQ*",
        "count": 5944
      },
      {
        "name": "Balkan Peninsula",
        "short": "DR",
        "query": "DR*",
        "count": 40157
      },
      {
        "name": "Asia",
        "short": "DS",
        "query": "DS*",
        "count": 273326
      },
      {
        "name": "Africa",
        "short": "DT",
        "query": "DT*",
        "count": 61190
      },
      {
        "name": "Oceania (South Seas)",
        "short": "DU",
        "query": "DU*",
        "count": 15877
      },
      {
        "name": "Romanies",
        "short": "DX",
        "query": "DX*",
        "count": 1117
      }
    ],
    "count": 925581
  },
  {
    "name": "History of America",
    "short": "E",
    "query": "E*",
    "children": [
      {
        "name": "E does not have any subclasses",
        "short": "E",
        "query": "E--*",
        "count": 138490
      }
    ],
    "count": 138786
  },
  {
    "name": "Local History of the Americas",
    "short": "F",
    "query": "F*",
    "children": [
      {
        "name": "F does not have any official subclasses",
        "short": "F",
        "query": "F--*",
        "count": 260680
      },
      {
        "name": "Canadian History (Unofficial)",
        "short": "FC",
        "query": "FC*",
        "count": 2980
      }
    ],
    "count": 264350
  },
  {
    "name": "Geography, Anthropology, Recreation",
    "short": "G",
    "query": "G*",
    "children": [
      {
        "name": "Geography (General). Atlases. Maps",
        "short": "G",
        "query": "G--*",
        "count": 35451
      },
      {
        "name": "Mathematical geography. Cartography",
        "short": "GA",
        "query": "GA*",
        "count": 4406
      },
      {
        "name": "Physical geography",
        "short": "GB",
        "query": "GB*",
        "count": 21008
      },
      {
        "name": "Oceanography",
        "short": "GC",
        "query": "GC*",
        "count": 7433
      },
      {
        "name": "Environmental Sciences",
        "short": "GE",
        "query": "GE*",
        "count": 6211
      },
      {
        "name": "Human ecology. Anthropogeography",
        "short": "GF",
        "query": "GF*",
        "count": 5234
      },
      {
        "name": "Anthropology",
        "short": "GN",
        "query": "GN*",
        "count": 34826
      },
      {
        "name": "Folklore",
        "short": "GR",
        "query": "GR*",
        "count": 22085
      },
      {
        "name": "Manners and customs (General)",
        "short": "GT",
        "query": "GT*",
        "count": 17784
      },
      {
        "name": "Recreation. Leisure",
        "short": "GV",
        "query": "GV*",
        "count": 99104
      }
    ],
    "count": 252976
  },
  {
    "name": "Social Sciences",
    "short": "H",
    "query": "H*",
    "children": [
      {
        "name": "Social sciences (General)",
        "short": "H",
        "query": "H--*",
        "count": 12346
      },
      {
        "name": "Statistics",
        "short": "HA",
        "query": "HA*",
        "count": 14651
      },
      {
        "name": "Economic theory. Demography",
        "short": "HB",
        "query": "HB*",
        "count": 62244
      },
      {
        "name": "Economic history and conditions",
        "short": "HC",
        "query": "HC*",
        "count": 150607
      },
      {
        "name": "Industries. Land use. Labor",
        "short": "HD",
        "query": "HD*",
        "count": 311800
      },
      {
        "name": "Transportation and communications",
        "short": "HE",
        "query": "HE*",
        "count": 49179
      },
      {
        "name": "Commerce",
        "short": "HF",
        "query": "HF*",
        "count": 109831
      },
      {
        "name": "Finance",
        "short": "HG",
        "query": "HG*",
        "count": 79832
      },
      {
        "name": "Public finance",
        "short": "HJ",
        "query": "HJ*",
        "count": 29813
      },
      {
        "name": "Sociology (General)",
        "short": "HM",
        "query": "HM*",
        "count": 34366
      },
      {
        "name": "Social history and conditions. Social problems. Social reform",
        "short": "HN",
        "query": "HN*",
        "count": 51201
      },
      {
        "name": "The family. Marriage, Women and Sexuality",
        "short": "HQ",
        "query": "HQ*",
        "count": 102076
      },
      {
        "name": "Societies: secret, benevolent, etc.",
        "short": "HS",
        "query": "HS*",
        "count": 6531
      },
      {
        "name": "Communities. Classes. Races",
        "short": "HT",
        "query": "HT*",
        "count": 38993
      },
      {
        "name": "Social pathology. Social and public welfare. Criminology",
        "short": "HV",
        "query": "HV*",
        "count": 126438
      },
      {
        "name": "Socialism. Communism. Anarchism",
        "short": "HX",
        "query": "HX*",
        "count": 35010
      }
    ],
    "count": 1204241
  },
  {
    "name": "Political Science",
    "short": "J",
    "query": "J*",
    "children": [
      {
        "name": "General legislative and executive papers",
        "short": "J",
        "query": "J--*",
        "count": 6260
      },
      {
        "name": "Political science (General)",
        "short": "JA",
        "query": "JA*",
        "count": 10626
      },
      {
        "name": "Political theory",
        "short": "JC",
        "query": "JC*",
        "count": 29771
      },
      {
        "name": "Political institutions and public administration",
        "short": "JF",
        "query": "JF*",
        "count": 9046
      },
      {
        "name": "Political institutions and public administration (North America)",
        "short": "JJ",
        "query": "JJ*",
        "count": 13
      },
      {
        "name": "Political institutions and public administration (United States)",
        "short": "JK",
        "query": "JK*",
        "count": 24459
      },
      {
        "name": "Political institutions and public administration (Canada, Latin America, etc.)",
        "short": "JL",
        "query": "JL*",
        "count": 13814
      },
      {
        "name": "Political institutions and public administration (Europe)",
        "short": "JN",
        "query": "JN*",
        "count": 42253
      },
      {
        "name": "Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)",
        "short": "JQ",
        "query": "JQ*",
        "count": 27999
      },
      {
        "name": "Local government. Municipal government",
        "short": "JS",
        "query": "JS*",
        "count": 16161
      },
      {
        "name": "Colonies and colonization. Emigration and immigration. International migration",
        "short": "JV",
        "query": "JV*",
        "count": 9720
      },
      {
        "name": "International law, see JZ and KZ (obsolete)",
        "short": "JX",
        "query": "JX*",
        "count": 32673
      },
      {
        "name": "International relations",
        "short": "JZ",
        "query": "JZ*",
        "count": 8440
      }
    ],
    "count": 230377
  },
  {
    "name": "Law",
    "short": "K",
    "query": "K*",
    "children": [
      {
        "name": "Law in general. Comparative and uniform law. Jurisprudence",
        "short": "K",
        "query": "K--*",
        "count": 37742
      },
      {
        "name": "Religious law in general. Comparative religious law. Jurisprudence",
        "short": "KB",
        "query": "KB*",
        "count": 4441
      },
      {
        "name": "Jewish law",
        "short": "KBM",
        "query": "KBM*",
        "count": 565
      },
      {
        "name": "Islamic law",
        "short": "KBP",
        "query": "KBP*",
        "count": 2357
      },
      {
        "name": "History of canon law",
        "short": "KBR",
        "query": "KBR*",
        "count": 770
      },
      {
        "name": "Canon law of Eastern churches",
        "short": "KBS",
        "query": "KBS*",
        "count": 13
      },
      {
        "name": "Canon law of Eastern Rite Churches in Communion with the Holy See of Rome",
        "short": "KBT",
        "query": "KBT*",
        "count": 8
      },
      {
        "name": "Law of the Roman Catholic Church. The Holy See",
        "short": "KBU",
        "query": "KBU*",
        "count": 500
      },
      {
        "name": "KD/KDK - United Kingdom and Ireland",
        "short": "KD/KDK",
        "query": "[KD TO KDK]",
        "count": 14892
      },
      {
        "name": "America. North America",
        "short": "KDZ",
        "query": "KDZ*",
        "count": 533
      },
      {
        "name": "Canada",
        "short": "KE",
        "query": "KE*",
        "count": 6838
      },
      {
        "name": "United States",
        "short": "KF",
        "query": "KF*",
        "count": 159421
      },
      {
        "name": "Latin America – Mexico and Central America – West Indies. Caribbean area",
        "short": "KG",
        "query": "KG*",
        "count": 9997
      },
      {
        "name": "South America",
        "short": "KH",
        "query": "KH*",
        "count": 25843
      },
      {
        "name": "KJ-KKZ – Europe",
        "short": "KJ-KKZ",
        "query": "[KJ TO KKZ]",
        "count": 86686
      },
      {
        "name": "KL-KWX – Asia and Eurasia, Africa, Pacific Area, and Antarctica",
        "short": "KL-KWX",
        "query": "[KL TO KWX]",
        "count": 53117
      },
      {
        "name": "KU/KUQ – Law of Australia and New Zealand",
        "short": "KU/KUQ",
        "query": "[KU TO KUQ]",
        "count": 1879
      },
      {
        "name": "Law of nations",
        "short": "KZ",
        "query": "KZ*",
        "count": 4700
      }
    ],
    "count": 405638
  },
  {
    "name": "Education",
    "short": "L",
    "query": "L*",
    "children": [
      {
        "name": "Education (General)",
        "short": "L",
        "query": "L--*",
        "count": 5814
      },
      {
        "name": "History of education",
        "short": "LA",
        "query": "LA*",
        "count": 151676
      },
      {
        "name": "Theory and practice of education",
        "short": "LB",
        "query": "LB*",
        "count": 101949
      },
      {
        "name": "Special aspects of education",
        "short": "LC",
        "query": "LC*",
        "count": 49480
      },
      {
        "name": "Individual institutions – United States",
        "short": "LD",
        "query": "LD*",
        "count": 7100
      },
      {
        "name": "Individual institutions – America (except United States)",
        "short": "LE",
        "query": "LE*",
        "count": 4789
      },
      {
        "name": "Individual institutions – Europe",
        "short": "LF",
        "query": "LF*",
        "count": 6758
      },
      {
        "name": "Individual institutions – Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific islands",
        "short": "LG",
        "query": "LG*",
        "count": 2860
      },
      {
        "name": "College and school magazines and papers",
        "short": "LH",
        "query": "LH*",
        "count": 86
      },
      {
        "name": "Student fraternities and societies, United States",
        "short": "LJ",
        "query": "LJ*",
        "count": 405
      },
      {
        "name": "Textbooks",
        "short": "LT",
        "query": "LT*",
        "count": 185
      }
    ],
    "count": 329854
  },
  {
    "name": "Music",
    "short": "M",
    "query": "M*",
    "children": [
      {
        "name": "Music",
        "short": "M",
        "query": "M--*",
        "count": 39644
      },
      {
        "name": "Literature on music",
        "short": "ML",
        "query": "ML*",
        "count": 121513
      },
      {
        "name": "Instruction and study",
        "short": "MT",
        "query": "MT*",
        "count": 17726
      }
    ],
    "count": 178906
  },
  {
    "name": "Fine Arts",
    "short": "N",
    "query": "N*",
    "children": [
      {
        "name": "Visual arts",
        "short": "N",
        "query": "N--*",
        "count": 108512
      },
      {
        "name": "Architecture",
        "short": "NA",
        "query": "NA*",
        "count": 73600
      },
      {
        "name": "Sculpture",
        "short": "NB",
        "query": "NB*",
        "count": 20228
      },
      {
        "name": "Drawing. Design. Illustration",
        "short": "NC",
        "query": "NC*",
        "count": 26757
      },
      {
        "name": "Painting",
        "short": "ND",
        "query": "ND*",
        "count": 78825
      },
      {
        "name": "Print media",
        "short": "NE",
        "query": "NE*",
        "count": 13792
      },
      {
        "name": "Decorative arts",
        "short": "NK",
        "query": "NK*",
        "count": 50545
      },
      {
        "name": "Arts in general",
        "short": "NX",
        "query": "NX*",
        "count": 13103
      }
    ],
    "count": 380372
  },
  {
    "name": "Language and Literature",
    "short": "P",
    "query": "P*",
    "count": 2180107,
    "children": [
      {
        "name": "Philology. Linguistics",
        "short": "P",
        "query": "P--*",
        "count": 50100
      },
      {
        "name": "Greek language and literature. Latin language and literature",
        "short": "PA",
        "query": "PA*",
        "count": 43509
      },
      {
        "name": "Modern languages. Celtic languages and literature",
        "short": "PB",
        "query": "PB*",
        "count": 7256
      },
      {
        "name": "Romanic languages",
        "short": "PC",
        "query": "PC*",
        "count": 52499
      },
      {
        "name": "Germanic languages. Scandinavian languages",
        "short": "PD",
        "query": "PD*",
        "count": 4446
      },
      {
        "name": "English language",
        "short": "PE",
        "query": "PE*",
        "count": 37083
      },
      {
        "name": "West Germanic languages",
        "short": "PF",
        "query": "PF*",
        "count": 12245
      },
      {
        "name": "Slavic languages and literatures. Baltic languages. Albanian language",
        "short": "PG",
        "query": "PG*",
        "count": 168251
      },
      {
        "name": "Uralic languages. Basque language",
        "short": "PH",
        "query": "PH*",
        "count": 20681
      },
      {
        "name": "Oriental languages and literatures",
        "short": "PJ",
        "query": "PJ*",
        "count": 63584
      },
      {
        "name": "Indo-Iranian languages and literatures",
        "short": "PK",
        "query": "PK*",
        "count": 130947
      },
      {
        "name": "Languages and literatures of Eastern Asia, Africa, Oceania",
        "short": "PL",
        "query": "PL*",
        "count": 186764
      },
      {
        "name": "Hyperborean, Native American, and artificial languages",
        "short": "PM",
        "query": "PM*",
        "count": 6445
      },
      {
        "name": "Literature (General)",
        "short": "PN",
        "query": "PN*",
        "count": 223075
      },
      {
        "name": "French literature – Italian literature – Spanish literature – Portuguese literature",
        "short": "PQ",
        "query": "PQ*",
        "count": 338153
      },
      {
        "name": "English literature",
        "short": "PR",
        "query": "PR*",
        "count": 216081
      },
      {
        "name": "American literature",
        "short": "PS",
        "query": "PS*",
        "count": 289364
      },
      {
        "name": "German literature – Dutch literature – Flemish literature since 1830 – Afrikaans literature -Scandinavian literature – Old Norse literature: Old Icelandic and Old Norwegian – Modern Icelandic literature – Faroese literature – Danish literature – Norwegian literature – Swedish literature",
        "short": "PT",
        "query": "PT*",
        "count": 129018
      },
      {
        "name": "Fiction and juvenile belles lettres",
        "short": "PZ",
        "query": "PZ*",
        "count": 286328
      }
    ]
  },
  {
    "name": "Science",
    "short": "Q",
    "query": "Q*",
    "children": [
      {
        "name": "Science (General)",
        "short": "Q",
        "query": "Q--*",
        "count": 46944
      },
      {
        "name": "Mathematics",
        "short": "QA",
        "query": "QA*",
        "count": 129662
      },
      {
        "name": "Astronomy",
        "short": "QB",
        "query": "QB*",
        "count": 23893
      },
      {
        "name": "Physics",
        "short": "QC",
        "query": "QC*",
        "count": 71446
      },
      {
        "name": "Chemistry",
        "short": "QD",
        "query": "QD*",
        "count": 36150
      },
      {
        "name": "Geology",
        "short": "QE",
        "query": "QE*",
        "count": 65227
      },
      {
        "name": "Natural history – Biology",
        "short": "QH",
        "query": "QH*",
        "count": 52515
      },
      {
        "name": "Botany",
        "short": "QK",
        "query": "QK*",
        "count": 32111
      },
      {
        "name": "Zoology",
        "short": "QL",
        "query": "QL*",
        "count": 70708
      },
      {
        "name": "Human anatomy",
        "short": "QM",
        "query": "QM*",
        "count": 4751
      },
      {
        "name": "Physiology",
        "short": "QP",
        "query": "QP*",
        "count": 34663
      },
      {
        "name": "Microbiology",
        "short": "QR",
        "query": "QR*",
        "count": 9638
      }
    ],
    "count": 568294
  },
  {
    "name": "Medicine",
    "short": "R",
    "query": "R*",
    "children": [
      {
        "name": "Medicine (General)",
        "short": "R",
        "query": "R--*",
        "count": 33272
      },
      {
        "name": "Public aspects of medicine",
        "short": "RA",
        "query": "RA*",
        "count": 61473
      },
      {
        "name": "Pathology",
        "short": "RB",
        "query": "RB*",
        "count": 6867
      },
      {
        "name": "Internal medicine",
        "short": "RC",
        "query": "RC*",
        "count": 100729
      },
      {
        "name": "Surgery",
        "short": "RD",
        "query": "RD*",
        "count": 17509
      },
      {
        "name": "Ophthalmology",
        "short": "RE",
        "query": "RE*",
        "count": 4763
      },
      {
        "name": "Otorhinolaryngology",
        "short": "RF",
        "query": "RF*",
        "count": 2599
      },
      {
        "name": "Gynecology and Obstetrics",
        "short": "RG",
        "query": "RG*",
        "count": 12204
      },
      {
        "name": "Pediatrics",
        "short": "RJ",
        "query": "RJ*",
        "count": 18034
      },
      {
        "name": "Dentistry",
        "short": "RK",
        "query": "RK*",
        "count": 5000
      },
      {
        "name": "Dermatology",
        "short": "RL",
        "query": "RL*",
        "count": 2265
      },
      {
        "name": "Therapeutics. Pharmacology",
        "short": "RM",
        "query": "RM*",
        "count": 19465
      },
      {
        "name": "Pharmacy and materia medica",
        "short": "RS",
        "query": "RS*",
        "count": 7039
      },
      {
        "name": "Nursing",
        "short": "RT",
        "query": "RT*",
        "count": 9012
      },
      {
        "name": "Botanic, Thomsonian, and Eclectic medicine",
        "short": "RV",
        "query": "RV*",
        "count": 101
      },
      {
        "name": "Homeopathy",
        "short": "RX",
        "query": "RX*",
        "count": 843
      },
      {
        "name": "Other systems of medicine",
        "short": "RZ",
        "query": "RZ*",
        "count": 2245
      }
    ],
    "count": 301951
  },
  {
    "name": "Agriculture",
    "short": "S",
    "query": "S*",
    "children": [
      {
        "name": "Agriculture (General)",
        "short": "S",
        "query": "S--*",
        "count": 35260
      },
      {
        "name": "Horticulture. Plant propagation. Plant breeding",
        "short": "SB",
        "query": "SB*",
        "count": 41678
      },
      {
        "name": "Forestry. Arboriculture. Silviculture",
        "short": "SD",
        "query": "SD*",
        "count": 15361
      },
      {
        "name": "Animal husbandry. Animal science",
        "short": "SF",
        "query": "SF*",
        "count": 31911
      },
      {
        "name": "Aquaculture. Fisheries. Angling",
        "short": "SH",
        "query": "SH*",
        "count": 15066
      },
      {
        "name": "Hunting",
        "short": "SK",
        "query": "SK*",
        "count": 6909
      }
    ],
    "count": 145367
  },
  {
    "name": "Technology",
    "short": "T",
    "query": "T*",
    "children": [
      {
        "name": "Technology (General)",
        "short": "T",
        "query": "T--*",
        "count": 30761
      },
      {
        "name": "Engineering Civil engineering (General).",
        "short": "TA",
        "query": "TA*",
        "count": 50901
      },
      {
        "name": "Hydraulic engineering. Ocean engineering",
        "short": "TC",
        "query": "TC*",
        "count": 11968
      },
      {
        "name": "Environmental technology. Sanitary engineering",
        "short": "TD",
        "query": "TD*",
        "count": 38265
      },
      {
        "name": "Highway engineering. Roads and pavements",
        "short": "TE",
        "query": "TE*",
        "count": 6151
      },
      {
        "name": "Railroad engineering and operation",
        "short": "TF",
        "query": "TF*",
        "count": 8643
      },
      {
        "name": "Bridges",
        "short": "TG",
        "query": "TG*",
        "count": 3036
      },
      {
        "name": "Building construction",
        "short": "TH",
        "query": "TH*",
        "count": 20578
      },
      {
        "name": "Mechanical engineering and machinery",
        "short": "TJ",
        "query": "TJ*",
        "count": 30395
      },
      {
        "name": "Electrical engineering. Electronics. Nuclear engineering",
        "short": "TK",
        "query": "TK*",
        "count": 62138
      },
      {
        "name": "Motor vehicles. Aeronautics. Astronautics",
        "short": "TL",
        "query": "TL*",
        "count": 44566
      },
      {
        "name": "Mining engineering. Metallurgy",
        "short": "TN",
        "query": "TN*",
        "count": 34961
      },
      {
        "name": "Chemical technology",
        "short": "TP",
        "query": "TP*",
        "count": 29893
      },
      {
        "name": "Photography",
        "short": "TR",
        "query": "TR*",
        "count": 26186
      },
      {
        "name": "Manufacturing engineering. Mass production",
        "short": "TS",
        "query": "TS*",
        "count": 28813
      },
      {
        "name": "Handicrafts. Arts and crafts",
        "short": "TT",
        "query": "TT*",
        "count": 28276
      },
      {
        "name": "Home economics",
        "short": "TX",
        "query": "TX*",
        "count": 64812
      }
    ],
    "count": 516320
  },
  {
    "name": "Military Science",
    "short": "U",
    "query": "U*",
    "children": [
      {
        "name": "Military science (General)",
        "short": "U",
        "query": "U--*",
        "count": 15015
      },
      {
        "name": "Armies: Organization, distribution, military situation",
        "short": "UA",
        "query": "UA*",
        "count": 20466
      },
      {
        "name": "Military administration",
        "short": "UB",
        "query": "UB*",
        "count": 6879
      },
      {
        "name": "Military maintenance and transportation",
        "short": "UC",
        "query": "UC*",
        "count": 2535
      },
      {
        "name": "Infantry",
        "short": "UD",
        "query": "UD*",
        "count": 1056
      },
      {
        "name": "Cavalry. Armor",
        "short": "UE",
        "query": "UE*",
        "count": 324
      },
      {
        "name": "Artillery",
        "short": "UF",
        "query": "UF*",
        "count": 2107
      },
      {
        "name": "Military engineering. Air forces",
        "short": "UG",
        "query": "UG*",
        "count": 11271
      },
      {
        "name": "Other military services",
        "short": "UH",
        "query": "UH*",
        "count": 1303
      }
    ],
    "count": 60711
  },
  {
    "name": "Naval Science",
    "short": "V",
    "query": "V*",
    "children": [
      {
        "name": "Naval science (General)",
        "short": "V",
        "query": "V--*",
        "count": 4018
      },
      {
        "name": "Navies: Organization, distribution, naval situation",
        "short": "VA",
        "query": "VA*",
        "count": 3131
      },
      {
        "name": "Naval administration",
        "short": "VB",
        "query": "VB*",
        "count": 459
      },
      {
        "name": "Naval maintenance",
        "short": "VC",
        "query": "VC*",
        "count": 248
      },
      {
        "name": "Naval seamen",
        "short": "VD",
        "query": "VD*",
        "count": 35
      },
      {
        "name": "Marines",
        "short": "VE",
        "query": "VE*",
        "count": 510
      },
      {
        "name": "Naval ordnance",
        "short": "VF",
        "query": "VF*",
        "count": 182
      },
      {
        "name": "Minor services of navies",
        "short": "VG",
        "query": "VG*",
        "count": 922
      },
      {
        "name": "Navigation. Merchant marine",
        "short": "VK",
        "query": "VK*",
        "count": 5832
      },
      {
        "name": "Naval architecture. Shipbuilding. Marine engineering",
        "short": "VM",
        "query": "VM*",
        "count": 7783
      }
    ],
    "count": 23018
  },
  {
    "name": "Bibliography, Library Science",
    "short": "Z",
    "query": "Z*",
    "children": [
      {
        "name": "Books (General). Writing. Paleography. Book industries and trade. Libraries. Bibliography",
        "short": "Z",
        "query": "Z--*",
        "count": 176479
      },
      {
        "name": "Information resources/materials",
        "short": "ZA",
        "query": "ZA*",
        "count": 1146
      }
    ],
    "count": 177625
  }
]