Classification
000 - Computer science, information & general works
170 - Ethics
300 - Social sciences
330 - Economics
320 - Political science
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
200 - Religion
2
333 - Economics of land & energy
2
158 - Applied psychology
1
338 - Production
1
340 - Law
1
380 - Commerce, communications & transportation
1
600 - Technology
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
658 - General management
1
800 - Literature & rhetoric
1
900 - History & geography
1