Classification
330 - Economics
650 - Management & auxiliary services
658 - General management
158 - Applied psychology
700
302 - Social interaction
295
338 - Production
294
300 - Social sciences
291
153 - Mental processes & intelligence
274
331 - Labor economics
232
381 - Commerce
147
670 - Manufacturing
142
500 - Natural sciences & mathematics
118
384 - Communications; telecommunication
69
000 - Computer science, information & general works
44
170 - Ethics
39
380 - Commerce, communications & transportation
37
150 - Psychology
29
001 - Knowledge
26
174 - Occupational ethics
19
005 - Computer programming, programs & data
18
006 - Special computer methods
18
332 - Financial economics
16
800 - Literature & rhetoric
15
620 - Engineering & allied operations
13
155 - Differential & developmental psychology
11
745 - Decorative arts
9
303 - Social processes
8
659 - Advertising & public relations
8
004 - Data processing & computer science
5
304 - Factors affecting social behavior
5
152 - Perception, movement, emotions & drives
4
808 - Rhetoric & collections of literature
4
339 - Macroeconomics & related topics
3
600 - Technology
3
610 - Medicine & health
3
368 - Insurance
2
639 - Hunting, fishing & conservation
2
740 - Drawing & decorative arts
2
011 - Bibliographies
1
253 - Pastoral office & work
1
320 - Political science
1
334 - Cooperatives
1
352 - General considerations of public administration
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
1
364 - Criminology
1
372 - Elementary education
1
388 - Transportation; ground transportation
1
510 - Mathematics
1
615 - Pharmacology & therapeutics
1
more ...