Classification
658 - General management
330 - Economics
109
338 - Production
46
331 - Labor economics
37
300 - Social sciences
28
302 - Social interaction
27
650 - Management & auxiliary services
21
153 - Mental processes & intelligence
20
620 - Engineering & allied operations
17
381 - Commerce
15
384 - Communications; telecommunication
15
005 - Computer programming, programs & data
13
380 - Commerce, communications & transportation
13
670 - Manufacturing
13
158 - Applied psychology
10
006 - Special computer methods
9
500 - Natural sciences & mathematics
9
332 - Financial economics
8
333 - Economics of land & energy
7
600 - Technology
7
170 - Ethics
6
001 - Knowledge
4
004 - Data processing & computer science
4
303 - Social processes
4
610 - Medicine & health
4
621 - Applied physics
4
700 - The arts; fine & decorative arts
4
745 - Decorative arts
4
000 - Computer science, information & general works
3
003 - Systems
3
304 - Factors affecting social behavior
3
659 - Advertising & public relations
3
900 - History & geography
3
140 - Specific philosophical schools
2
150 - Psychology
2
174 - Occupational ethics
2
320 - Political science
2
352 - General considerations of public administration
2
363 - Other social problems & services
2
364 - Criminology
2
368 - Insurance
2
602 - Miscellany
2
657 - Accounting
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
155 - Differential & developmental psychology
1
160 - Logic
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
more ...