Classification
501 - Philosophy & theory
733
100 - Philosophy & psychology
126
530 - Physics
114
900 - History & geography
97
300 - Social sciences
55
120 - Epistemology, causation & humankind
45
160 - Logic
37
509 - Historical, geographic & persons treatment
36
510 - Mathematics
30
142 - Critical philosophy
26
170 - Ethics
25
128 - Humankind
23
600 - Technology
22
610 - Medicine & health
20
110 - Metaphysics
17
303 - Social processes
17
190 - Modern western philosophy
16
500 - Natural sciences & mathematics
15
006 - Special computer methods
14
140 - Specific philosophical schools
14
150 - Psychology
14
370 - Education
14
570 - Life sciences; biology
14
576 - Genetics & evolution
13
109 - Historical & collected persons treatment
12
301 - Sociology & anthropology
12
507 - Education, research & related topics
12
511 - General principles of mathematics
12
519 - Probabilities & applied mathematics
12
320 - Political science
11
333 - Economics of land & energy
11
540 - Chemistry & allied sciences
11
153 - Mental processes & intelligence
9
180 - Ancient, medieval & eastern philosophy
9
330 - Economics
9
620 - Engineering & allied operations
9
700 - The arts; fine & decorative arts
9
210 - Philosophy & theory of religion
8
612 - Human physiology
8
004 - Data processing & computer science
7
005 - Computer programming, programs & data
7
113 - Cosmology
7
306 - Culture & institutions
7
363 - Other social problems & services
7
520 - Astronomy & allied sciences
7
001 - Knowledge
6
601 - Philosophy & theory
6
616 - Diseases
6
111 - Ontology
5
149 - Other philosophical systems
5
more ...