Classification
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302 - Social interaction
8
541 - Physical chemistry
8
570 - Life sciences; biology
8
580 - Plants (Botany)
8
200 - Religion
7
400 - Language
7
550 - Earth sciences
7
301 - Sociology & anthropology
6
384 - Communications; telecommunication
6
660 - Chemical engineering
6
170 - Ethics
5
260 - Social & ecclesiastical theology
5
371 - Schools & their activities; special education
5
537 - Electricity & electronics
5
720 - Architecture
5
800 - Literature & rhetoric
5
001 - Knowledge
4
158 - Applied psychology
4
280 - Christian denominations & sects
4
338 - Production
4
401 - Philosophy & theory
4
526 - Mathematical geography
4
535 - Light & infrared & ultraviolet phenomena
4
691 - Building materials
4
025 - Library operations
3
113 - Cosmology
3
128 - Humankind
3
297 - Islam, Babism & Bahai Faith
3
304 - Factors affecting social behavior
3
343 - Military, tax, trade & industrial law
3
361 - Social problems & social welfare in general
3
362 - Social welfare problems & services
3
410 - Linguistics
3
414 - Phonology & phonetics
3
507 - Education, research & related topics
3
513 - Arithmetic
3
536 - Heat
3
577 - Ecology
3
629 - Other branches of engineering
3
650 - Management & auxiliary services
3
693 - Specific materials & purposes
3
808 - Rhetoric & collections of literature
3
011 - Bibliographies
2
109 - Historical & collected persons treatment
2
150 - Psychology
2
190 - Modern western philosophy
2
230 - Christianity & Christian theology
2
332 - Financial economics
2
346 - Private law
2
374 - Adult education
2
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