Classification
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670 - Manufacturing
16
900 - History & geography
16
001 - Knowledge
15
150 - Psychology
15
303 - Social processes
15
306 - Culture & institutions
15
800 - Literature & rhetoric
15
003 - Systems
14
615 - Pharmacology & therapeutics
13
140 - Specific philosophical schools
12
612 - Human physiology
12
660 - Chemical engineering
12
305 - Social groups
11
530 - Physics
11
628 - Sanitary & municipal engineering
11
630 - Agriculture & related technologies
11
690 - Buildings
11
341 - Law of nations
10
809 - History, description & criticism
10
170 - Ethics
9
551 - Geology, hydrology & meteorology
9
624 - Civil engineering
9
362 - Social welfare problems & services
8
378 - Higher education
8
577 - Ecology
8
794 - Indoor games of skill
8
614 - Incidence & prevention of disease
7
152 - Perception, movement, emotions & drives
6
155 - Differential & developmental psychology
6
307 - Communities
6
339 - Macroeconomics & related topics
6
364 - Criminology
6
379 - Public policy issues in education
6
512 - Algebra
6
541 - Physical chemistry
6
550 - Earth sciences
6
613 - Personal health & safety
6
691 - Building materials
6
791 - Public performances
6
301 - Sociology & anthropology
5
361 - Social problems & social welfare in general
5
501 - Philosophy & theory
5
511 - General principles of mathematics
5
535 - Light & infrared & ultraviolet phenomena
5
572 - Biochemistry
5
576 - Genetics & evolution
5
581 - Specific topics in natural history
5
659 - Advertising & public relations
5
664 - Food technology
5
025 - Library operations
4
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