Classification
320 - Political science
340 - Law
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
6
900 - History & geography
5
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
576 - Genetics & evolution
4
363 - Other social problems & services
3
600 - Technology
3
620 - Engineering & allied operations
3
720 - Architecture
3
000 - Computer science, information & general works
2
330 - Economics
2
100 - Philosophy & psychology
1
300 - Social sciences
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
370 - Education
1
410 - Linguistics
1
530 - Physics
1