Classification
320 - Political science
2,576
900 - History & geography
692
330 - Economics
649
300 - Social sciences
625
100 - Philosophy & psychology
482
700 - The arts; fine & decorative arts
368
333 - Economics of land & energy
287
340 - Law
265
140 - Specific philosophical schools
216
200 - Religion
196
363 - Other social problems & services
186
370 - Education
182
301 - Sociology & anthropology
142
304 - Factors affecting social behavior
142
380 - Commerce, communications & transportation
139
600 - Technology
133
170 - Ethics
128
000 - Computer science, information & general works
113
610 - Medicine & health
111
800 - Literature & rhetoric
90
361 - Social problems & social welfare in general
87
400 - Language
80
350 - Public administration & military science
66
551 - Geology, hydrology & meteorology
66
581 - Specific topics in natural history
55
620 - Engineering & allied operations
51
297 - Islam, Babism & Bahai Faith
50
576 - Genetics & evolution
45
780 - Music
40
410 - Linguistics
37
630 - Agriculture & related technologies
31
120 - Epistemology, causation & humankind
27
360 - Social problems & services; associations
26
720 - Architecture
26
336 - Public finance
24
500 - Natural sciences & mathematics
20
364 - Criminology
16
530 - Physics
16
791 - Public performances
11
658 - General management
10
770 - Photography, photographs & computer art
10
657 - Accounting
7
296 - Judaism
5
414 - Phonology & phonetics
4
920 - Biography, genealogy & insignia
4
160 - Logic
3
580 - Plants (Botany)
3
398 - Folklore
2
520 - Astronomy & allied sciences
2
540 - Chemistry & allied sciences
2
more ...