Classification
000 - Computer science, information & general works
330 - Economics
600 - Technology
300 - Social sciences
7
363 - Other social problems & services
6
320 - Political science
5
900 - History & geography
5
340 - Law
4
620 - Engineering & allied operations
4
100 - Philosophy & psychology
3
170 - Ethics
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
370 - Education
2
200 - Religion
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
336 - Public finance
1
364 - Criminology
1
610 - Medicine & health
1
658 - General management
1