Classification
650 - Management & auxiliary services
658 - General management
330 - Economics
1,146
158 - Applied psychology
711
302 - Social interaction
324
300 - Social sciences
310
338 - Production
293
153 - Mental processes & intelligence
276
331 - Labor economics
265
381 - Commerce
151
670 - Manufacturing
143
500 - Natural sciences & mathematics
127
384 - Communications; telecommunication
79
000 - Computer science, information & general works
61
380 - Commerce, communications & transportation
41
170 - Ethics
39
005 - Computer programming, programs & data
37
150 - Psychology
34
001 - Knowledge
26
174 - Occupational ethics
19
006 - Special computer methods
18
332 - Financial economics
16
800 - Literature & rhetoric
15
620 - Engineering & allied operations
13
745 - Decorative arts
12
155 - Differential & developmental psychology
11
303 - Social processes
9
004 - Data processing & computer science
8
659 - Advertising & public relations
8
152 - Perception, movement, emotions & drives
6
304 - Factors affecting social behavior
4
640 - Home & family management
4
339 - Macroeconomics & related topics
3
600 - Technology
3
610 - Medicine & health
3
808 - Rhetoric & collections of literature
3
011 - Bibliographies
2
320 - Political science
2
368 - Insurance
2
639 - Hunting, fishing & conservation
2
740 - Drawing & decorative arts
2
020 - Library & information sciences
1
253 - Pastoral office & work
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
371 - Schools & their activities; special education
1
372 - Elementary education
1
more ...