Classification
100 - Philosophy & psychology
320 - Political science
340 - Law
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
7
300 - Social sciences
7
170 - Ethics
5
333 - Economics of land & energy
5
370 - Education
5
900 - History & geography
5
363 - Other social problems & services
4
200 - Religion
3
330 - Economics
3
380 - Commerce, communications & transportation
3
400 - Language
3
581 - Specific topics in natural history
3
000 - Computer science, information & general works
2
301 - Sociology & anthropology
2
600 - Technology
2
658 - General management
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
410 - Linguistics
1
620 - Engineering & allied operations
1
780 - Music
1
800 - Literature & rhetoric
1