Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
170 - Ethics
320 - Political science
11
140 - Specific philosophical schools
10
200 - Religion
9
400 - Language
7
530 - Physics
6
700 - The arts; fine & decorative arts
5
900 - History & geography
5
340 - Law
3
500 - Natural sciences & mathematics
3
000 - Computer science, information & general works
2
160 - Logic
2
333 - Economics of land & energy
2
600 - Technology
2
610 - Medicine & health
2
300 - Social sciences
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1