Classification
160 - Logic
100 - Philosophy & psychology
8
320 - Political science
4
330 - Economics
4
900 - History & geography
4
120 - Epistemology, causation & humankind
3
300 - Social sciences
3
500 - Natural sciences & mathematics
3
140 - Specific philosophical schools
2
170 - Ethics
2
200 - Religion
2
400 - Language
2
410 - Linguistics
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
128 - Humankind
1
150 - Psychology
1
321 - Systems of governments & states
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
520 - Astronomy & allied sciences
1
530 - Physics
1
620 - Engineering & allied operations
1