Classification
170 - Ethics
340 - Law
100 - Philosophy & psychology
62
320 - Political science
61
140 - Specific philosophical schools
46
330 - Economics
40
610 - Medicine & health
32
700 - The arts; fine & decorative arts
32
200 - Religion
28
300 - Social sciences
25
900 - History & geography
22
600 - Technology
15
333 - Economics of land & energy
12
000 - Computer science, information & general works
11
363 - Other social problems & services
11
380 - Commerce, communications & transportation
10
620 - Engineering & allied operations
10
370 - Education
9
301 - Sociology & anthropology
8
361 - Social problems & social welfare in general
8
576 - Genetics & evolution
6
580 - Plants (Botany)
6
120 - Epistemology, causation & humankind
5
400 - Language
5
800 - Literature & rhetoric
5
297 - Islam, Babism & Bahai Faith
4
530 - Physics
4
630 - Agriculture & related technologies
4
364 - Criminology
3
581 - Specific topics in natural history
3
658 - General management
3
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
720 - Architecture
2
160 - Logic
1
174 - Occupational ethics
1
241 - Christian ethics
1
344 - Labor, social, education & cultural law
1
345 - Criminal law
1
346 - Private law
1
362 - Social welfare problems & services
1
398 - Folklore
1
551 - Geology, hydrology & meteorology
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1