Classification
200 - Religion
900 - History & geography
9
320 - Political science
7
100 - Philosophy & psychology
6
140 - Specific philosophical schools
6
330 - Economics
6
700 - The arts; fine & decorative arts
6
610 - Medicine & health
5
380 - Commerce, communications & transportation
4
333 - Economics of land & energy
3
370 - Education
3
170 - Ethics
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
340 - Law
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
530 - Physics
2
600 - Technology
2
720 - Architecture
2
000 - Computer science, information & general works
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
360 - Social problems & services; associations
1
364 - Criminology
1
581 - Specific topics in natural history
1
800 - Literature & rhetoric
1