Classification
900 - History & geography
320 - Political science
666
330 - Economics
429
700 - The arts; fine & decorative arts
181
300 - Social sciences
171
800 - Literature & rhetoric
148
576 - Genetics & evolution
92
340 - Law
91
200 - Religion
78
600 - Technology
78
140 - Specific philosophical schools
77
620 - Engineering & allied operations
75
333 - Economics of land & energy
65
100 - Philosophy & psychology
58
363 - Other social problems & services
56
610 - Medicine & health
56
370 - Education
55
301 - Sociology & anthropology
44
380 - Commerce, communications & transportation
44
400 - Language
43
410 - Linguistics
38
304 - Factors affecting social behavior
37
000 - Computer science, information & general works
30
780 - Music
24
297 - Islam, Babism & Bahai Faith
20
630 - Agriculture & related technologies
20
720 - Architecture
17
791 - Public performances
16
581 - Specific topics in natural history
15
551 - Geology, hydrology & meteorology
14
580 - Plants (Botany)
12
296 - Judaism
11
943 - Central Europe; Germany
11
170 - Ethics
10
361 - Social problems & social welfare in general
10
500 - Natural sciences & mathematics
9
770 - Photography, photographs & computer art
9
530 - Physics
6
398 - Folklore
5
520 - Astronomy & allied sciences
5
350 - Public administration & military science
4
414 - Phonology & phonetics
4
830 - Literatures of Germanic languages
4
540 - Chemistry & allied sciences
3
616 - Diseases
3
940 - History of Europe
3
016 - Bibliographies of works on specific subjects
2
120 - Epistemology, causation & humankind
2
160 - Logic
2
261 - Social theology
2
more ...