Classification
300 - Social sciences
320 - Political science
4
330 - Economics
3
900 - History & geography
3
000 - Computer science, information & general works
2
001 - Knowledge
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
200 - Religion
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
600 - Technology
1
658 - General management
1