Classification
330 - Economics
340 - Law
333 - Economics of land & energy
9
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
6
000 - Computer science, information & general works
5
320 - Political science
5
363 - Other social problems & services
5
600 - Technology
5
630 - Agriculture & related technologies
4
610 - Medicine & health
3
620 - Engineering & allied operations
3
900 - History & geography
3
300 - Social sciences
2
301 - Sociology & anthropology
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
612 - Human physiology
1
658 - General management
1
720 - Architecture
1