Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
900 - History & geography
105
170 - Ethics
103
320 - Political science
90
200 - Religion
82
700 - The arts; fine & decorative arts
74
300 - Social sciences
55
370 - Education
51
340 - Law
45
330 - Economics
41
301 - Sociology & anthropology
39
600 - Technology
39
333 - Economics of land & energy
36
800 - Literature & rhetoric
33
000 - Computer science, information & general works
30
363 - Other social problems & services
30
610 - Medicine & health
27
410 - Linguistics
23
380 - Commerce, communications & transportation
20
400 - Language
20
120 - Epistemology, causation & humankind
17
576 - Genetics & evolution
17
581 - Specific topics in natural history
16
500 - Natural sciences & mathematics
13
620 - Engineering & allied operations
13
530 - Physics
11
780 - Music
10
304 - Factors affecting social behavior
7
551 - Geology, hydrology & meteorology
6
297 - Islam, Babism & Bahai Faith
5
580 - Plants (Botany)
5
612 - Human physiology
5
630 - Agriculture & related technologies
5
160 - Logic
4
361 - Social problems & social welfare in general
4
770 - Photography, photographs & computer art
4
414 - Phonology & phonetics
3
128 - Humankind
2
615 - Pharmacology & therapeutics
2
720 - Architecture
2
880 - Hellenic literatures; classical Greek
2
171 - Ethical systems
1
296 - Judaism
1
302 - Social interaction
1
306 - Culture & institutions
1
360 - Social problems & services; associations
1
364 - Criminology
1
520 - Astronomy & allied sciences
1
590 - Animals (Zoology)
1
more ...