Classification
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
6
300 - Social sciences
2
301 - Sociology & anthropology
3
304 - Factors affecting social behavior
1
320 - Political science
330 - Economics
5
333 - Economics of land & energy
5
340 - Law
363 - Other social problems & services
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
3
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
3
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
4
610 - Medicine & health
1
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
1
657 - Accounting
1
700 - The arts; fine & decorative arts
9
720 - Architecture
4
900 - History & geography