Classification
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910 - Geography & travel
9
140 - Specific philosophical schools
8
301 - Sociology & anthropology
8
340 - Law
8
380 - Commerce, communications & transportation
8
501 - Philosophy & theory
8
616 - Diseases
8
155 - Differential & developmental psychology
7
303 - Social processes
7
304 - Factors affecting social behavior
7
537 - Electricity & electronics
7
650 - Management & auxiliary services
7
150 - Psychology
6
384 - Communications; telecommunication
6
532 - Fluid mechanics; liquid mechanics
6
302 - Social interaction
5
332 - Financial economics
5
745 - Decorative arts
5
100 - Philosophy & psychology
4
153 - Mental processes & intelligence
4
306 - Culture & institutions
4
370 - Education
4
371 - Schools & their activities; special education
4
572 - Biochemistry
4
580 - Plants (Botany)
4
614 - Incidence & prevention of disease
4
800 - Literature & rhetoric
4
128 - Humankind
3
307 - Communities
3
401 - Philosophy & theory
3
418 - Standard usage & applied linguistics
3
526 - Mathematical geography
3
780 - Music
3
025 - Library operations
2
050 - General serial publications
2
120 - Epistemology, causation & humankind
2
339 - Macroeconomics & related topics
2
361 - Social problems & social welfare in general
2
381 - Commerce
2
410 - Linguistics
2
521 - Celestial mechanics
2
542 - Techniques, equipment & materials
2
547 - Organic chemistry
2
548 - Crystallography
2
579 - Microorganisms, fungi & algae
2
581 - Specific topics in natural history
2
613 - Personal health & safety
2
617 - Surgery & related medical specialties
2
628 - Sanitary & municipal engineering
2
634 - Orchards, fruits & forestry
2
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