Classification
658 - General management
330 - Economics
156
331 - Labor economics
142
338 - Production
40
302 - Social interaction
39
304 - Factors affecting social behavior
37
300 - Social sciences
36
670 - Manufacturing
31
170 - Ethics
29
500 - Natural sciences & mathematics
21
650 - Management & auxiliary services
15
381 - Commerce
14
158 - Applied psychology
13
333 - Economics of land & energy
9
384 - Communications; telecommunication
9
363 - Other social problems & services
8
600 - Technology
8
000 - Computer science, information & general works
7
380 - Commerce, communications & transportation
6
700 - The arts; fine & decorative arts
6
140 - Specific philosophical schools
5
303 - Social processes
5
001 - Knowledge
4
320 - Political science
4
332 - Financial economics
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
100 - Philosophy & psychology
3
659 - Advertising & public relations
3
174 - Occupational ethics
2
336 - Public finance
2
361 - Social problems & social welfare in general
2
580 - Plants (Botany)
2
900 - History & geography
2
004 - Data processing & computer science
1
006 - Special computer methods
1
011 - Bibliographies
1
153 - Mental processes & intelligence
1
200 - Religion
1
305 - Social groups
1
340 - Law
1
346 - Private law
1
368 - Insurance
1
387 - Water, air & space transportation
1
398 - Folklore
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1