Classification
380 - Commerce, communications & transportation
658 - General management
132
384 - Communications; telecommunication
129
330 - Economics
95
300 - Social sciences
56
302 - Social interaction
54
331 - Labor economics
28
500 - Natural sciences & mathematics
18
670 - Manufacturing
17
650 - Management & auxiliary services
16
338 - Production
11
808 - Rhetoric & collections of literature
11
000 - Computer science, information & general works
10
153 - Mental processes & intelligence
10
158 - Applied psychology
9
140 - Specific philosophical schools
7
320 - Political science
7
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
370 - Education
5
600 - Technology
5
381 - Commerce
4
551 - Geology, hydrology & meteorology
4
150 - Psychology
3
340 - Law
3
363 - Other social problems & services
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
720 - Architecture
3
100 - Philosophy & psychology
2
152 - Perception, movement, emotions & drives
2
155 - Differential & developmental psychology
2
170 - Ethics
2
303 - Social processes
2
400 - Language
2
659 - Advertising & public relations
2
174 - Occupational ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
352 - General considerations of public administration
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
651 - Office services
1
657 - Accounting
1
800 - Literature & rhetoric
1
900 - History & geography
1