Classification
330 - Economics
658 - General management
109
320 - Political science
86
333 - Economics of land & energy
70
300 - Social sciences
67
700 - The arts; fine & decorative arts
45
363 - Other social problems & services
43
900 - History & geography
41
338 - Production
37
380 - Commerce, communications & transportation
32
600 - Technology
29
340 - Law
27
140 - Specific philosophical schools
26
650 - Management & auxiliary services
24
005 - Computer programming, programs & data
22
100 - Philosophy & psychology
22
620 - Engineering & allied operations
22
331 - Labor economics
21
610 - Medicine & health
20
302 - Social interaction
19
500 - Natural sciences & mathematics
18
000 - Computer science, information & general works
17
301 - Sociology & anthropology
16
170 - Ethics
15
304 - Factors affecting social behavior
15
158 - Applied psychology
13
630 - Agriculture & related technologies
12
153 - Mental processes & intelligence
11
361 - Social problems & social welfare in general
11
370 - Education
11
800 - Literature & rhetoric
11
200 - Religion
10
332 - Financial economics
10
381 - Commerce
8
400 - Language
8
551 - Geology, hydrology & meteorology
8
384 - Communications; telecommunication
7
581 - Specific topics in natural history
7
410 - Linguistics
5
670 - Manufacturing
5
720 - Architecture
5
780 - Music
5
006 - Special computer methods
4
360 - Social problems & services; associations
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
657 - Accounting
4
297 - Islam, Babism & Bahai Faith
3
303 - Social processes
3
364 - Criminology
3
more ...