Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
107
500 - Natural sciences & mathematics
91
600 - Technology
69
333 - Economics of land & energy
63
380 - Commerce, communications & transportation
53
330 - Economics
51
610 - Medicine & health
51
363 - Other social problems & services
38
620 - Engineering & allied operations
37
900 - History & geography
35
140 - Specific philosophical schools
30
576 - Genetics & evolution
29
320 - Political science
27
100 - Philosophy & psychology
25
540 - Chemistry & allied sciences
24
580 - Plants (Botany)
19
300 - Social sciences
18
340 - Law
18
530 - Physics
17
658 - General management
17
400 - Language
16
551 - Geology, hydrology & meteorology
14
612 - Human physiology
14
370 - Education
13
581 - Specific topics in natural history
12
800 - Literature & rhetoric
10
630 - Agriculture & related technologies
9
410 - Linguistics
8
414 - Phonology & phonetics
8
720 - Architecture
8
170 - Ethics
7
615 - Pharmacology & therapeutics
5
304 - Factors affecting social behavior
4
384 - Communications; telecommunication
3
780 - Music
3
011 - Bibliographies
2
070 - News media, journalism & publishing
2
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
332 - Financial economics
2
338 - Production
2
001 - Knowledge
1
153 - Mental processes & intelligence
1
200 - Religion
1
302 - Social interaction
1
339 - Macroeconomics & related topics
1
350 - Public administration & military science
1
520 - Astronomy & allied sciences
1
more ...