Classification
340 - Law
500 - Natural sciences & mathematics
600 - Technology
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
5
900 - History & geography
5
576 - Genetics & evolution
4
140 - Specific philosophical schools
3
320 - Political science
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
720 - Architecture
3
330 - Economics
1
333 - Economics of land & energy
1