Classification
140 - Specific philosophical schools
300 - Social sciences
320 - Political science
15
900 - History & geography
10
700 - The arts; fine & decorative arts
7
301 - Sociology & anthropology
6
304 - Factors affecting social behavior
4
363 - Other social problems & services
4
100 - Philosophy & psychology
3
170 - Ethics
3
330 - Economics
3
340 - Law
3
370 - Education
3
720 - Architecture
3
800 - Literature & rhetoric
3
333 - Economics of land & energy
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
120 - Epistemology, causation & humankind
1
200 - Religion
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1