Classification
100 - Philosophy & psychology
330 - Economics
380 - Commerce, communications & transportation
320 - Political science
12
000 - Computer science, information & general works
5
140 - Specific philosophical schools
5
300 - Social sciences
5
600 - Technology
5
900 - History & geography
5
370 - Education
4
400 - Language
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
780 - Music
4
340 - Law
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
410 - Linguistics
2
658 - General management
2
170 - Ethics
1
336 - Public finance
1
350 - Public administration & military science
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
657 - Accounting
1
800 - Literature & rhetoric
1