Classification
300 - Social sciences
330 - Economics
380 - Commerce, communications & transportation
384 - Communications; telecommunication
120
658 - General management
117
302 - Social interaction
101
500 - Natural sciences & mathematics
62
670 - Manufacturing
58
331 - Labor economics
25
320 - Political science
23
338 - Production
13
600 - Technology
12
650 - Management & auxiliary services
11
700 - The arts; fine & decorative arts
9
340 - Law
8
381 - Commerce
8
900 - History & geography
8
000 - Computer science, information & general works
7
153 - Mental processes & intelligence
7
363 - Other social problems & services
7
370 - Education
7
620 - Engineering & allied operations
7
400 - Language
6
100 - Philosophy & psychology
5
808 - Rhetoric & collections of literature
5
150 - Psychology
4
158 - Applied psychology
4
170 - Ethics
4
301 - Sociology & anthropology
4
333 - Economics of land & energy
4
140 - Specific philosophical schools
3
200 - Religion
3
410 - Linguistics
3
780 - Music
3
006 - Special computer methods
2
155 - Differential & developmental psychology
2
303 - Social processes
2
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
659 - Advertising & public relations
2
800 - Literature & rhetoric
2
152 - Perception, movement, emotions & drives
1
174 - Occupational ethics
1
657 - Accounting
1
720 - Architecture
1
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