Classification
300 - Social sciences
330 - Economics
228
320 - Political science
132
658 - General management
125
302 - Social interaction
86
500 - Natural sciences & mathematics
81
001 - Knowledge
71
670 - Manufacturing
66
331 - Labor economics
49
340 - Law
35
363 - Other social problems & services
33
338 - Production
32
630 - Agriculture & related technologies
25
900 - History & geography
22
140 - Specific philosophical schools
18
301 - Sociology & anthropology
16
380 - Commerce, communications & transportation
15
000 - Computer science, information & general works
14
333 - Economics of land & energy
14
700 - The arts; fine & decorative arts
13
381 - Commerce
12
620 - Engineering & allied operations
12
170 - Ethics
11
600 - Technology
11
100 - Philosophy & psychology
10
158 - Applied psychology
10
368 - Insurance
9
551 - Geology, hydrology & meteorology
9
610 - Medicine & health
9
581 - Specific topics in natural history
8
650 - Management & auxiliary services
8
153 - Mental processes & intelligence
7
304 - Factors affecting social behavior
7
332 - Financial economics
6
370 - Education
6
384 - Communications; telecommunication
6
005 - Computer programming, programs & data
5
200 - Religion
5
580 - Plants (Botany)
5
004 - Data processing & computer science
4
361 - Social problems & social welfare in general
4
364 - Criminology
4
576 - Genetics & evolution
4
360 - Social problems & services; associations
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
800 - Literature & rhetoric
3
303 - Social processes
2
344 - Labor, social, education & cultural law
2
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