Classification
170 - Ethics
300 - Social sciences
330 - Economics
56
320 - Political science
36
100 - Philosophy & psychology
31
658 - General management
24
302 - Social interaction
21
340 - Law
17
140 - Specific philosophical schools
15
610 - Medicine & health
15
900 - History & geography
13
158 - Applied psychology
10
331 - Labor economics
10
600 - Technology
10
301 - Sociology & anthropology
8
333 - Economics of land & energy
8
670 - Manufacturing
8
363 - Other social problems & services
7
500 - Natural sciences & mathematics
7
650 - Management & auxiliary services
7
338 - Production
6
370 - Education
6
174 - Occupational ethics
5
304 - Factors affecting social behavior
5
380 - Commerce, communications & transportation
5
800 - Literature & rhetoric
5
000 - Computer science, information & general works
4
200 - Religion
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
361 - Social problems & social welfare in general
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
004 - Data processing & computer science
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
344 - Labor, social, education & cultural law
1
360 - Social problems & services; associations
1
364 - Criminology
1
381 - Commerce
1
384 - Communications; telecommunication
1
400 - Language
1
659 - Advertising & public relations
1