Classification
331 - Labor economics
658 - General management
344
330 - Economics
313
300 - Social sciences
206
670 - Manufacturing
206
500 - Natural sciences & mathematics
193
302 - Social interaction
190
338 - Production
106
384 - Communications; telecommunication
44
620 - Engineering & allied operations
44
158 - Applied psychology
42
650 - Management & auxiliary services
38
374 - Adult education
37
005 - Computer programming, programs & data
31
150 - Psychology
29
381 - Commerce
29
004 - Data processing & computer science
22
006 - Special computer methods
22
000 - Computer science, information & general works
16
745 - Decorative arts
13
304 - Factors affecting social behavior
12
153 - Mental processes & intelligence
11
380 - Commerce, communications & transportation
10
001 - Knowledge
9
332 - Financial economics
9
170 - Ethics
8
780 - Music
8
621 - Applied physics
7
681 - Precision instruments & other devices
7
600 - Technology
5
659 - Advertising & public relations
4
781 - General principles & musical forms
4
303 - Social processes
3
368 - Insurance
3
174 - Occupational ethics
2
510 - Mathematics
2
307 - Communities
1
339 - Macroeconomics & related topics
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
1
363 - Other social problems & services
1
364 - Criminology
1
613 - Personal health & safety
1
629 - Other branches of engineering
1
651 - Office services
1
657 - Accounting
1
665 - Industrial oils, fats, waxes & gases
1
671 - Metalworking & primary metal products
1
688 - Other final products & packaging
1
740 - Drawing & decorative arts
1
more ...