Classification
100 - Philosophy & psychology
170 - Ethics
370 - Education
900 - History & geography
7
140 - Specific philosophical schools
6
300 - Social sciences
6
320 - Political science
5
200 - Religion
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
301 - Sociology & anthropology
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
304 - Factors affecting social behavior
1
340 - Law
1
380 - Commerce, communications & transportation
1
400 - Language
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1