Classification
330 - Economics
331 - Labor economics
48
658 - General management
41
300 - Social sciences
29
302 - Social interaction
24
610 - Medicine & health
13
363 - Other social problems & services
12
500 - Natural sciences & mathematics
12
670 - Manufacturing
11
320 - Political science
9
338 - Production
9
650 - Management & auxiliary services
8
158 - Applied psychology
7
140 - Specific philosophical schools
5
000 - Computer science, information & general works
4
384 - Communications; telecommunication
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
150 - Psychology
2
340 - Law
2
370 - Education
2
380 - Commerce, communications & transportation
2
381 - Commerce
2
620 - Engineering & allied operations
2
153 - Mental processes & intelligence
1
160 - Logic
1
170 - Ethics
1
174 - Occupational ethics
1
304 - Factors affecting social behavior
1
305 - Social groups
1
333 - Economics of land & energy
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
368 - Insurance
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
651 - Office services
1
745 - Decorative arts
1
780 - Music
1