Classification
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
600 - Technology
7
620 - Engineering & allied operations
7
900 - History & geography
140 - Specific philosophical schools
5
700 - The arts; fine & decorative arts
5
320 - Political science
4
363 - Other social problems & services
4
340 - Law
3
576 - Genetics & evolution
3
720 - Architecture
3
370 - Education
2
100 - Philosophy & psychology
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
780 - Music
1