Classification
140 - Specific philosophical schools
581 - Specific topics in natural history
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
5
620 - Engineering & allied operations
5
320 - Political science
4
000 - Computer science, information & general works
3
361 - Social problems & social welfare in general
3
200 - Religion
2
330 - Economics
2
333 - Economics of land & energy
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
170 - Ethics
1
301 - Sociology & anthropology
1
340 - Law
1
350 - Public administration & military science
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1