Classification
900 - History & geography
143
700 - The arts; fine & decorative arts
71
320 - Political science
68
363 - Other social problems & services
59
301 - Sociology & anthropology
56
140 - Specific philosophical schools
55
330 - Economics
55
333 - Economics of land & energy
49
300 - Social sciences
42
000 - Computer science, information & general works
39
610 - Medicine & health
33
340 - Law
28
370 - Education
26
581 - Specific topics in natural history
23
400 - Language
21
551 - Geology, hydrology & meteorology
21
580 - Plants (Botany)
19
200 - Religion
17
600 - Technology
17
100 - Philosophy & psychology
14
305 - Social groups
14
800 - Literature & rhetoric
14
630 - Agriculture & related technologies
13
410 - Linguistics
12
170 - Ethics
11
304 - Factors affecting social behavior
8
380 - Commerce, communications & transportation
7
620 - Engineering & allied operations
7
780 - Music
7
341 - Law of nations
6
346 - Private law
6
398 - Folklore
6
576 - Genetics & evolution
6
720 - Architecture
6
500 - Natural sciences & mathematics
5
342 - Constitutional & administrative law
4
361 - Social problems & social welfare in general
4
540 - Chemistry & allied sciences
4
658 - General management
4
297 - Islam, Babism & Bahai Faith
3
972 - Middle America; Mexico
3
994 - Australia
3
120 - Epistemology, causation & humankind
2
323 - Civil & political rights
2
338 - Production
2
350 - Public administration & military science
2
364 - Criminology
2
371 - Schools & their activities; special education
2
414 - Phonology & phonetics
2
590 - Animals (Zoology)
2
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