Classification
170 - Ethics
28
330 - Economics
26
100 - Philosophy & psychology
18
340 - Law
13
320 - Political science
12
700 - The arts; fine & decorative arts
12
300 - Social sciences
9
400 - Language
8
900 - History & geography
7
140 - Specific philosophical schools
6
200 - Religion
4
370 - Education
4
610 - Medicine & health
4
121 - Epistemology
3
174 - Occupational ethics
3
333 - Economics of land & energy
3
576 - Genetics & evolution
3
600 - Technology
3
120 - Epistemology, causation & humankind
2
128 - Humankind
2
304 - Factors affecting social behavior
2
306 - Culture & institutions
2
363 - Other social problems & services
2
410 - Linguistics
2
630 - Agriculture & related technologies
2
657 - Accounting
2
000 - Computer science, information & general works
1
006 - Special computer methods
1
109 - Historical & collected persons treatment
1
126 - The self
1
155 - Differential & developmental psychology
1
160 - Logic
1
171 - Ethical systems
1
179 - Other ethical norms
1
180 - Ancient, medieval & eastern philosophy
1
181 - Eastern philosophy
1
193 - Philosophy of Germany & Austria
1
297 - Islam, Babism & Bahai Faith
1
303 - Social processes
1
305 - Social groups
1
350 - Public administration & military science
1
355 - Military science
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
more ...