000 - Computer science, information, general works
1,027
100 - Philosophy & psychology
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200 - Religion
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300 - Social sciences
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400 - Language
667
500 - Natural sciences and mathematics
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600 - Technology (Applied sciences)
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700 - The arts
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800 - Literature (Belles-lettres) and rhetoric
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900 - History & geography
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010 - Bibliography
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060 - General organizations and museology
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080 - General collections
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030 - General encyclopedic works
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090 - Manuscripts, rare books
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300 - Social sciences
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320 - Political science (Politics and government)
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460 - Spanish, Portuguese, Galician
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810 - American literature in English
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120 - Epistemology, causation, humankind
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570 - Biology
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630 - Agriculture and related technologies
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650 - Management and auxiliary services
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790 - Recreational and performing arts
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900 - History & geography
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