Classification
320 - Political science
340 - Law
900 - History & geography
28
140 - Specific philosophical schools
24
300 - Social sciences
20
100 - Philosophy & psychology
16
330 - Economics
14
700 - The arts; fine & decorative arts
13
304 - Factors affecting social behavior
9
333 - Economics of land & energy
8
170 - Ethics
7
800 - Literature & rhetoric
6
200 - Religion
5
380 - Commerce, communications & transportation
4
000 - Computer science, information & general works
3
296 - Judaism
3
301 - Sociology & anthropology
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
363 - Other social problems & services
3
370 - Education
3
400 - Language
3
297 - Islam, Babism & Bahai Faith
2
364 - Criminology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
600 - Technology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
360 - Social problems & services; associations
1
398 - Folklore
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
791 - Public performances
1