Classification
320 - Political science
340 - Law
380 - Commerce, communications & transportation
600 - Technology
900 - History & geography
620 - Engineering & allied operations
7
330 - Economics
5
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
300 - Social sciences
3
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
720 - Architecture
3
400 - Language
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
657 - Accounting
1
658 - General management
1
780 - Music
1