Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
363 - Other social problems & services
9
000 - Computer science, information & general works
7
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
6
600 - Technology
5
900 - History & geography
5
300 - Social sciences
4
551 - Geology, hydrology & meteorology
4
140 - Specific philosophical schools
3
370 - Education
3
720 - Architecture
3
170 - Ethics
2
200 - Religion
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
658 - General management
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
610 - Medicine & health
1
650 - Management & auxiliary services
1
657 - Accounting
1
800 - Literature & rhetoric
1