Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
170 - Ethics
320 - Political science
140 - Specific philosophical schools
3
400 - Language
3
530 - Physics
3
900 - History & geography
3
200 - Religion
2
340 - Law
2
600 - Technology
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
300 - Social sciences
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
620 - Engineering & allied operations
1