Classification
800 - Literature & rhetoric
900 - History & geography
423
700 - The arts; fine & decorative arts
159
400 - Language
88
000 - Computer science, information & general works
86
300 - Social sciences
86
600 - Technology
74
320 - Political science
68
330 - Economics
61
100 - Philosophy & psychology
58
363 - Other social problems & services
56
333 - Economics of land & energy
52
140 - Specific philosophical schools
50
410 - Linguistics
45
620 - Engineering & allied operations
43
380 - Commerce, communications & transportation
40
200 - Religion
38
610 - Medicine & health
38
500 - Natural sciences & mathematics
31
370 - Education
27
580 - Plants (Botany)
26
576 - Genetics & evolution
25
304 - Factors affecting social behavior
20
340 - Law
17
551 - Geology, hydrology & meteorology
16
720 - Architecture
15
301 - Sociology & anthropology
14
170 - Ethics
13
581 - Specific topics in natural history
13
658 - General management
13
540 - Chemistry & allied sciences
12
530 - Physics
10
780 - Music
10
414 - Phonology & phonetics
9
630 - Agriculture & related technologies
9
398 - Folklore
7
120 - Epistemology, causation & humankind
6
297 - Islam, Babism & Bahai Faith
6
338 - Production
6
650 - Management & auxiliary services
6
158 - Applied psychology
5
332 - Financial economics
5
381 - Commerce
5
791 - Public performances
5
770 - Photography, photographs & computer art
4
001 - Knowledge
3
361 - Social problems & social welfare in general
3
590 - Animals (Zoology)
3
303 - Social processes
2
355 - Military science
2
more ...