Classification
330 - Economics
62
320 - Political science
38
610 - Medicine & health
22
658 - General management
16
174 - Occupational ethics
14
170 - Ethics
11
332 - Financial economics
11
338 - Production
11
616 - Diseases
11
340 - Law
9
617 - Surgery & related medical specialties
8
333 - Economics of land & energy
7
346 - Private law
6
004 - Data processing & computer science
5
300 - Social sciences
5
304 - Factors affecting social behavior
5
600 - Technology
5
344 - Labor, social, education & cultural law
4
363 - Other social problems & services
4
370 - Education
4
657 - Accounting
4
900 - History & geography
4
150 - Psychology
3
337 - International economics
3
368 - Insurance
3
519 - Probabilities & applied mathematics
3
621 - Applied physics
3
650 - Management & auxiliary services
3
700 - The arts; fine & decorative arts
3
001 - Knowledge
2
003 - Systems
2
302 - Social interaction
2
327 - International relations
2
331 - Labor economics
2
341 - Law of nations
2
342 - Constitutional & administrative law
2
343 - Military, tax, trade & industrial law
2
378 - Higher education
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
615 - Pharmacology & therapeutics
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
006 - Special computer methods
1
100 - Philosophy & psychology
1
128 - Humankind
1
140 - Specific philosophical schools
1
142 - Critical philosophy
1
153 - Mental processes & intelligence
1
more ...