Classification
300 - Social sciences
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
5
320 - Political science
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
2
620 - Engineering & allied operations
2
304 - Factors affecting social behavior
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1
900 - History & geography
1