Classification
320 - Political science
363 - Other social problems & services
610 - Medicine & health
900 - History & geography
330 - Economics
8
333 - Economics of land & energy
7
600 - Technology
7
700 - The arts; fine & decorative arts
6
620 - Engineering & allied operations
4
000 - Computer science, information & general works
3
100 - Philosophy & psychology
3
370 - Education
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
720 - Architecture
3
300 - Social sciences
2
140 - Specific philosophical schools
1
170 - Ethics
1
301 - Sociology & anthropology
1
340 - Law
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1