Classification
120 - Epistemology, causation & humankind
140 - Specific philosophical schools
4
700 - The arts; fine & decorative arts
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
170 - Ethics
2
200 - Religion
2
300 - Social sciences
2
363 - Other social problems & services
2
370 - Education
2
400 - Language
2
530 - Physics
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
900 - History & geography
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
320 - Political science
1
330 - Economics
1
340 - Law
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
720 - Architecture
1