Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
334
900 - History & geography
252
300 - Social sciences
238
340 - Law
192
200 - Religion
167
170 - Ethics
148
700 - The arts; fine & decorative arts
96
140 - Specific philosophical schools
90
370 - Education
74
301 - Sociology & anthropology
62
333 - Economics of land & energy
47
000 - Computer science, information & general works
44
363 - Other social problems & services
39
600 - Technology
39
610 - Medicine & health
39
400 - Language
37
800 - Literature & rhetoric
36
380 - Commerce, communications & transportation
31
120 - Epistemology, causation & humankind
29
576 - Genetics & evolution
27
361 - Social problems & social welfare in general
24
304 - Factors affecting social behavior
20
530 - Physics
20
297 - Islam, Babism & Bahai Faith
19
410 - Linguistics
19
620 - Engineering & allied operations
19
581 - Specific topics in natural history
16
630 - Agriculture & related technologies
14
780 - Music
12
350 - Public administration & military science
11
551 - Geology, hydrology & meteorology
11
336 - Public finance
10
720 - Architecture
9
500 - Natural sciences & mathematics
7
658 - General management
6
360 - Social problems & services; associations
5
296 - Judaism
4
364 - Criminology
4
770 - Photography, photographs & computer art
4
160 - Logic
3
920 - Biography, genealogy & insignia
3
193 - Philosophy of Germany & Austria
2
520 - Astronomy & allied sciences
2
580 - Plants (Botany)
2
657 - Accounting
2
303 - Social processes
1
550 - Earth sciences
1
808 - Rhetoric & collections of literature
1
more ...