Classification
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553 - Economic geology
20
200 - Religion
18
578 - Natural history of organisms
18
800 - Literature & rhetoric
18
338 - Production
16
662 - Explosives, fuels & related products
16
660 - Chemical engineering
15
370 - Education
14
579 - Microorganisms, fungi & algae
14
590 - Animals (Zoology)
14
541 - Physical chemistry
13
543 - Analytical chemistry
12
634 - Orchards, fruits & forestry
11
510 - Mathematics
10
518 - Numerical analysis
10
670 - Manufacturing
10
571 - Physiology & related subjects
9
627 - Hydraulic engineering
9
691 - Building materials
9
170 - Ethics
8
400 - Language
8
539 - Modern physics
8
546 - Inorganic chemistry
8
770 - Photography, photographs & computer art
8
344 - Labor, social, education & cultural law
7
930 - History of ancient world to ca. 499
7
025 - Library operations
6
537 - Electricity & electronics
6
696 - Utilities
6
201 - Religious mythology & social theology
5
511 - General principles of mathematics
5
820 - English & Old English literatures
5
001 - Knowledge
4
516 - Geometry
4
535 - Light & infrared & ultraviolet phenomena
4
536 - Heat
4
572 - Biochemistry
4
574 - [Unassigned]
4
616 - Diseases
4
120 - Epistemology, causation & humankind
3
307 - Communities
3
341 - Law of nations
3
613 - Personal health & safety
3
614 - Incidence & prevention of disease
3
615 - Pharmacology & therapeutics
3
622 - Mining & related operations
3
650 - Management & auxiliary services
3
661 - Industrial chemicals
3
780 - Music
3
791 - Public performances
3
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