Classification
170 - Ethics
320 - Political science
330 - Economics
343
100 - Philosophy & psychology
148
300 - Social sciences
74
900 - History & geography
65
340 - Law
60
200 - Religion
49
140 - Specific philosophical schools
46
700 - The arts; fine & decorative arts
44
600 - Technology
26
400 - Language
25
363 - Other social problems & services
24
333 - Economics of land & energy
22
370 - Education
21
610 - Medicine & health
21
380 - Commerce, communications & transportation
17
301 - Sociology & anthropology
15
620 - Engineering & allied operations
14
000 - Computer science, information & general works
13
120 - Epistemology, causation & humankind
13
800 - Literature & rhetoric
13
304 - Factors affecting social behavior
10
581 - Specific topics in natural history
9
361 - Social problems & social welfare in general
8
530 - Physics
7
551 - Geology, hydrology & meteorology
7
630 - Agriculture & related technologies
7
160 - Logic
6
410 - Linguistics
4
658 - General management
4
297 - Islam, Babism & Bahai Faith
3
360 - Social problems & services; associations
3
576 - Genetics & evolution
3
296 - Judaism
2
500 - Natural sciences & mathematics
2
179 - Other ethical norms
1
241 - Christian ethics
1
261 - Social theology
1
350 - Public administration & military science
1
364 - Criminology
1
398 - Folklore
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
580 - Plants (Botany)
1
780 - Music
1