Classification
658 - General management
37
340 - Law
36
306 - Culture & institutions
18
304 - Factors affecting social behavior
17
158 - Applied psychology
14
005 - Computer programming, programs & data
13
320 - Political science
12
330 - Economics
11
346 - Private law
10
362 - Social welfare problems & services
10
370 - Education
9
300 - Social sciences
8
301 - Sociology & anthropology
7
305 - Social groups
7
343 - Military, tax, trade & industrial law
7
378 - Higher education
7
650 - Management & auxiliary services
7
302 - Social interaction
6
327 - International relations
6
541 - Physical chemistry
6
616 - Diseases
6
333 - Economics of land & energy
5
371 - Schools & their activities; special education
5
620 - Engineering & allied operations
5
900 - History & geography
5
004 - Data processing & computer science
4
150 - Psychology
4
510 - Mathematics
4
610 - Medicine & health
4
629 - Other branches of engineering
4
641 - Food & drink
4
930 - History of ancient world to ca. 499
4
155 - Differential & developmental psychology
3
200 - Religion
3
297 - Islam, Babism & Bahai Faith
3
338 - Production
3
342 - Constitutional & administrative law
3
344 - Labor, social, education & cultural law
3
361 - Social problems & social welfare in general
3
363 - Other social problems & services
3
621 - Applied physics
3
657 - Accounting
3
664 - Food technology
3
690 - Buildings
3
780 - Music
3
910 - Geography & travel
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
336 - Public finance
2
345 - Criminal law
2
more ...