Classification
340 - Law
320 - Political science
756
330 - Economics
480
900 - History & geography
208
100 - Philosophy & psychology
115
300 - Social sciences
109
140 - Specific philosophical schools
68
700 - The arts; fine & decorative arts
66
576 - Genetics & evolution
65
170 - Ethics
37
200 - Religion
35
333 - Economics of land & energy
29
304 - Factors affecting social behavior
25
301 - Sociology & anthropology
20
363 - Other social problems & services
20
370 - Education
18
380 - Commerce, communications & transportation
18
600 - Technology
17
000 - Computer science, information & general works
14
800 - Literature & rhetoric
14
361 - Social problems & social welfare in general
13
350 - Public administration & military science
11
297 - Islam, Babism & Bahai Faith
9
400 - Language
9
581 - Specific topics in natural history
9
610 - Medicine & health
8
336 - Public finance
6
364 - Criminology
6
620 - Engineering & allied operations
6
551 - Geology, hydrology & meteorology
5
120 - Epistemology, causation & humankind
4
360 - Social problems & services; associations
4
410 - Linguistics
4
791 - Public performances
4
296 - Judaism
3
630 - Agriculture & related technologies
3
658 - General management
3
720 - Architecture
3
530 - Physics
2
770 - Photography, photographs & computer art
2
780 - Music
2
160 - Logic
1
241 - Christian ethics
1
303 - Social processes
1
305 - Social groups
1
327 - International relations
1
342 - Constitutional & administrative law
1
344 - Labor, social, education & cultural law
1
347 - Civil procedure & courts
1
500 - Natural sciences & mathematics
1
more ...