Classification
100 - Philosophy & psychology
333 - Economics of land & energy
340 - Law
700 - The arts; fine & decorative arts
320 - Political science
5
363 - Other social problems & services
4
140 - Specific philosophical schools
3
370 - Education
3
581 - Specific topics in natural history
3
170 - Ethics
2
330 - Economics
2
400 - Language
2
900 - History & geography
2
200 - Religion
1
300 - Social sciences
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
658 - General management
1
770 - Photography, photographs & computer art
1
780 - Music
1