Classification
300 - Social sciences
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
10
340 - Law
8
000 - Computer science, information & general works
7
900 - History & geography
7
100 - Philosophy & psychology
5
333 - Economics of land & energy
5
363 - Other social problems & services
5
700 - The arts; fine & decorative arts
5
370 - Education
4
400 - Language
4
620 - Engineering & allied operations
4
170 - Ethics
3
780 - Music
3
140 - Specific philosophical schools
2
200 - Religion
2
301 - Sociology & anthropology
2
410 - Linguistics
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
657 - Accounting
1
720 - Architecture
1
791 - Public performances
1
800 - Literature & rhetoric
1