Classification
100 - Philosophy & psychology
363 - Other social problems & services
900 - History & geography
700 - The arts; fine & decorative arts
9
333 - Economics of land & energy
8
600 - Technology
8
320 - Political science
7
581 - Specific topics in natural history
7
610 - Medicine & health
6
140 - Specific philosophical schools
5
620 - Engineering & allied operations
5
000 - Computer science, information & general works
4
170 - Ethics
4
200 - Religion
4
301 - Sociology & anthropology
3
330 - Economics
3
370 - Education
3
800 - Literature & rhetoric
3
300 - Social sciences
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
120 - Epistemology, causation & humankind
1
304 - Factors affecting social behavior
1
340 - Law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
590 - Animals (Zoology)
1
630 - Agriculture & related technologies
1
720 - Architecture
1
780 - Music
1
791 - Public performances
1
920 - Biography, genealogy & insignia
1