Classification
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500 - Natural sciences & mathematics
2
509 - Historical, geographic & persons treatment
1
510 - Mathematics
2
520 - Astronomy & allied sciences
4
540 - Chemistry & allied sciences
1
541 - Physical chemistry
1
576 - Genetics & evolution
4
577 - Ecology
1
600 - Technology
1
610 - Medicine & health
13
612 - Human physiology
1
616 - Diseases
5
617 - Surgery & related medical specialties
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
634 - Orchards, fruits & forestry
1
650 - Management & auxiliary services
1
658 - General management
2
660 - Chemical engineering
1
670 - Manufacturing
1
700 - The arts; fine & decorative arts
6
740 - Drawing & decorative arts
1
745 - Decorative arts
1
780 - Music
4
790 - Recreational & performing arts
2
800 - Literature & rhetoric
34
808 - Rhetoric & collections of literature
5
809 - History, description & criticism
1
810 - American literature in English
5
811 - American poetry in English
2
820 - English & Old English literatures
346
821 - English poetry
1
840 - Literatures of Romance languages
3
868 - Spanish miscellaneous writings
1
870 - Italic literatures; Latin literature
37
875 - Latin speeches
3
880 - Hellenic literatures; classical Greek
21
885 - Classical Greek speeches
4
886 - Classical Greek letters
1
892 - Afro-Asiatic literatures; Semitic literatures
1
900 - History & geography
20
910 - Geography & travel
2
920 - Biography, genealogy & insignia
8
930 - History of ancient world to ca. 499
6
937 - Italy & adjacent territories to 476
1
938 - Greece to 323
1
940 - History of Europe
8
949 - Other parts of Europe
1
970 - History of North America
83
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