Classification
300 - Social sciences
340 - Law
320 - Political science
720
330 - Economics
422
900 - History & geography
192
100 - Philosophy & psychology
83
576 - Genetics & evolution
64
630 - Agriculture & related technologies
62
200 - Religion
51
140 - Specific philosophical schools
47
301 - Sociology & anthropology
43
700 - The arts; fine & decorative arts
40
304 - Factors affecting social behavior
36
610 - Medicine & health
34
370 - Education
30
364 - Criminology
25
170 - Ethics
24
000 - Computer science, information & general works
20
333 - Economics of land & energy
20
363 - Other social problems & services
18
380 - Commerce, communications & transportation
17
600 - Technology
17
361 - Social problems & social welfare in general
15
800 - Literature & rhetoric
12
297 - Islam, Babism & Bahai Faith
11
360 - Social problems & services; associations
9
620 - Engineering & allied operations
9
400 - Language
7
410 - Linguistics
7
350 - Public administration & military science
6
658 - General management
6
720 - Architecture
5
120 - Epistemology, causation & humankind
2
398 - Folklore
2
500 - Natural sciences & mathematics
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
160 - Logic
1
336 - Public finance
1
337 - International economics
1
344 - Labor, social, education & cultural law
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1