Classification
501 - Philosophy & theory
670
320 - Political science
312
300 - Social sciences
166
306 - Culture & institutions
107
301 - Sociology & anthropology
87
100 - Philosophy & psychology
74
500 - Natural sciences & mathematics
71
530 - Physics
59
510 - Mathematics
58
340 - Law
55
900 - History & geography
49
330 - Economics
45
170 - Ethics
44
305 - Social groups
39
142 - Critical philosophy
37
160 - Logic
35
120 - Epistemology, causation & humankind
34
303 - Social processes
29
509 - Historical, geographic & persons treatment
25
128 - Humankind
24
190 - Modern western philosophy
20
304 - Factors affecting social behavior
20
302 - Social interaction
19
109 - Historical & collected persons treatment
18
338 - Production
17
150 - Psychology
16
110 - Metaphysics
14
610 - Medicine & health
14
006 - Special computer methods
13
121 - Epistemology
12
149 - Other philosophical systems
12
155 - Differential & developmental psychology
12
174 - Occupational ethics
12
153 - Mental processes & intelligence
11
180 - Ancient, medieval & eastern philosophy
11
511 - General principles of mathematics
11
570 - Life sciences; biology
11
658 - General management
11
001 - Knowledge
10
210 - Philosophy & theory of religion
10
327 - International relations
10
000 - Computer science, information & general works
9
113 - Cosmology
9
140 - Specific philosophical schools
9
333 - Economics of land & energy
9
507 - Education, research & related topics
9
519 - Probabilities & applied mathematics
9
004 - Data processing & computer science
8
111 - Ontology
8
200 - Religion
8
more ...