Classification
100 - Philosophy & psychology
20
170 - Ethics
17
900 - History & geography
17
501 - Philosophy & theory
16
160 - Logic
13
180 - Ancient, medieval & eastern philosophy
13
330 - Economics
12
340 - Law
10
530 - Physics
10
109 - Historical & collected persons treatment
9
320 - Political science
8
700 - The arts; fine & decorative arts
8
142 - Critical philosophy
7
174 - Occupational ethics
7
189 - Medieval western philosophy
7
110 - Metaphysics
6
120 - Epistemology, causation & humankind
6
128 - Humankind
6
171 - Ethical systems
6
510 - Mathematics
6
190 - Modern western philosophy
5
500 - Natural sciences & mathematics
5
509 - Historical, geographic & persons treatment
5
004 - Data processing & computer science
4
005 - Computer programming, programs & data
4
111 - Ontology
4
140 - Specific philosophical schools
4
179 - Other ethical norms
4
200 - Religion
4
370 - Education
4
401 - Philosophy & theory
4
610 - Medicine & health
4
185 - Aristotelian philosophy
3
300 - Social sciences
3
306 - Culture & institutions
3
511 - General principles of mathematics
3
531 - Classical mechanics; solid mechanics
3
658 - General management
3
800 - Literature & rhetoric
3
006 - Special computer methods
2
115 - Time
2
126 - The self
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
364 - Criminology
2
380 - Commerce, communications & transportation
2
520 - Astronomy & allied sciences
2
570 - Life sciences; biology
2
581 - Specific topics in natural history
2
601 - Philosophy & theory
2
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