Classification
100 - Philosophy & psychology
300 - Social sciences
7
301 - Sociology & anthropology
320 - Political science
370 - Education
140 - Specific philosophical schools
4
900 - History & geography
4
340 - Law
3
330 - Economics
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
170 - Ethics
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1