Classification
330 - Economics
12
500 - Natural sciences & mathematics
7
600 - Technology
7
333 - Economics of land & energy
6
000 - Computer science, information & general works
5
620 - Engineering & allied operations
4
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
320 - Political science
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
576 - Genetics & evolution
1