Classification
320 - Political science
900 - History & geography
144
100 - Philosophy & psychology
136
300 - Social sciences
129
330 - Economics
114
333 - Economics of land & energy
92
700 - The arts; fine & decorative arts
81
200 - Religion
64
340 - Law
63
140 - Specific philosophical schools
57
363 - Other social problems & services
54
304 - Factors affecting social behavior
41
370 - Education
40
170 - Ethics
39
301 - Sociology & anthropology
38
380 - Commerce, communications & transportation
36
610 - Medicine & health
35
000 - Computer science, information & general works
32
600 - Technology
31
400 - Language
28
800 - Literature & rhetoric
27
120 - Epistemology, causation & humankind
15
361 - Social problems & social welfare in general
15
410 - Linguistics
14
620 - Engineering & allied operations
13
297 - Islam, Babism & Bahai Faith
11
551 - Geology, hydrology & meteorology
11
576 - Genetics & evolution
10
581 - Specific topics in natural history
10
780 - Music
10
630 - Agriculture & related technologies
8
720 - Architecture
7
336 - Public finance
6
360 - Social problems & services; associations
5
364 - Criminology
4
500 - Natural sciences & mathematics
4
530 - Physics
4
580 - Plants (Botany)
4
296 - Judaism
2
302 - Social interaction
2
350 - Public administration & military science
2
398 - Folklore
2
540 - Chemistry & allied sciences
2
658 - General management
2
770 - Photography, photographs & computer art
2
160 - Logic
1
305 - Social groups
1
353 - Specific fields of public administration
1
414 - Phonology & phonetics
1