Classification
320 - Political science
500 - Natural sciences & mathematics
380 - Commerce, communications & transportation
4
600 - Technology
4
620 - Engineering & allied operations
4
900 - History & geography
4
140 - Specific philosophical schools
3
340 - Law
3
363 - Other social problems & services
3
576 - Genetics & evolution
3
700 - The arts; fine & decorative arts
3
720 - Architecture
3
100 - Philosophy & psychology
2
300 - Social sciences
2
170 - Ethics
1
301 - Sociology & anthropology
1
370 - Education
1
610 - Medicine & health
1