Classification
100 - Philosophy & psychology
330 - Economics
610 - Medicine & health
7
000 - Computer science, information & general works
3
170 - Ethics
3
320 - Political science
3
361 - Social problems & social welfare in general
3
380 - Commerce, communications & transportation
3
333 - Economics of land & energy
2
360 - Social problems & services; associations
2
363 - Other social problems & services
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
370 - Education
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1
900 - History & geography
1