Classification
100 - Philosophy & psychology
304 - Factors affecting social behavior
370 - Education
300 - Social sciences
3
320 - Political science
3
400 - Language
3
900 - History & geography
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
330 - Economics
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
170 - Ethics
1
200 - Religion
1
333 - Economics of land & energy
1
340 - Law
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
550 - Earth sciences
1
600 - Technology
1
800 - Literature & rhetoric
1
920 - Biography, genealogy & insignia
1