Classification
170 - Ethics
330 - Economics
7
100 - Philosophy & psychology
6
320 - Political science
6
140 - Specific philosophical schools
4
600 - Technology
4
300 - Social sciences
3
333 - Economics of land & energy
2
370 - Education
2
576 - Genetics & evolution
2
610 - Medicine & health
2
658 - General management
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
174 - Occupational ethics
1
302 - Social interaction
1
331 - Labor economics
1
346 - Private law
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1