Classification
301 - Sociology & anthropology
300 - Social sciences
561
900 - History & geography
339
320 - Political science
202
700 - The arts; fine & decorative arts
170
200 - Religion
161
140 - Specific philosophical schools
112
100 - Philosophy & psychology
111
330 - Economics
82
610 - Medicine & health
79
363 - Other social problems & services
67
780 - Music
65
370 - Education
60
304 - Factors affecting social behavior
59
340 - Law
58
600 - Technology
56
400 - Language
53
333 - Economics of land & energy
49
000 - Computer science, information & general works
43
380 - Commerce, communications & transportation
42
170 - Ethics
38
800 - Literature & rhetoric
37
297 - Islam, Babism & Bahai Faith
32
410 - Linguistics
28
576 - Genetics & evolution
27
630 - Agriculture & related technologies
24
620 - Engineering & allied operations
22
581 - Specific topics in natural history
21
720 - Architecture
20
398 - Folklore
17
350 - Public administration & military science
12
361 - Social problems & social welfare in general
12
160 - Logic
10
500 - Natural sciences & mathematics
10
364 - Criminology
9
530 - Physics
9
540 - Chemistry & allied sciences
6
120 - Epistemology, causation & humankind
5
551 - Geology, hydrology & meteorology
5
360 - Social problems & services; associations
4
658 - General management
4
770 - Photography, photographs & computer art
4
414 - Phonology & phonetics
3
520 - Astronomy & allied sciences
3
580 - Plants (Botany)
3
615 - Pharmacology & therapeutics
3
336 - Public finance
2
590 - Animals (Zoology)
2
791 - Public performances
2
920 - Biography, genealogy & insignia
2
more ...