Classification
300 - Social sciences
330 - Economics
380 - Commerce, communications & transportation
384 - Communications; telecommunication
117
658 - General management
114
302 - Social interaction
99
500 - Natural sciences & mathematics
61
670 - Manufacturing
57
331 - Labor economics
24
338 - Production
13
320 - Political science
12
650 - Management & auxiliary services
11
600 - Technology
10
700 - The arts; fine & decorative arts
8
000 - Computer science, information & general works
7
153 - Mental processes & intelligence
7
370 - Education
7
381 - Commerce
7
620 - Engineering & allied operations
7
900 - History & geography
7
340 - Law
6
400 - Language
6
100 - Philosophy & psychology
5
808 - Rhetoric & collections of literature
5
150 - Psychology
4
158 - Applied psychology
4
301 - Sociology & anthropology
4
363 - Other social problems & services
4
200 - Religion
3
333 - Economics of land & energy
3
410 - Linguistics
3
780 - Music
3
006 - Special computer methods
2
140 - Specific philosophical schools
2
155 - Differential & developmental psychology
2
170 - Ethics
2
303 - Social processes
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
659 - Advertising & public relations
2
152 - Perception, movement, emotions & drives
1
174 - Occupational ethics
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
581 - Specific topics in natural history
1
657 - Accounting
1
791 - Public performances
1
800 - Literature & rhetoric
1