Classification
300 - Social sciences
658 - General management
370
330 - Economics
347
302 - Social interaction
290
670 - Manufacturing
170
500 - Natural sciences & mathematics
168
338 - Production
138
320 - Political science
69
650 - Management & auxiliary services
64
700 - The arts; fine & decorative arts
62
363 - Other social problems & services
58
331 - Labor economics
53
333 - Economics of land & energy
46
153 - Mental processes & intelligence
37
000 - Computer science, information & general works
32
140 - Specific philosophical schools
30
301 - Sociology & anthropology
30
158 - Applied psychology
29
900 - History & geography
25
381 - Commerce
24
620 - Engineering & allied operations
23
720 - Architecture
23
370 - Education
18
600 - Technology
18
380 - Commerce, communications & transportation
16
551 - Geology, hydrology & meteorology
14
100 - Philosophy & psychology
13
304 - Factors affecting social behavior
12
384 - Communications; telecommunication
12
610 - Medicine & health
12
340 - Law
10
630 - Agriculture & related technologies
10
001 - Knowledge
9
581 - Specific topics in natural history
9
200 - Religion
7
170 - Ethics
6
332 - Financial economics
6
368 - Insurance
6
343 - Military, tax, trade & industrial law
5
576 - Genetics & evolution
4
800 - Literature & rhetoric
4
004 - Data processing & computer science
3
303 - Social processes
3
400 - Language
3
580 - Plants (Botany)
3
745 - Decorative arts
3
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
510 - Mathematics
2
more ...