Classification
340 - Law
107
330 - Economics
32
320 - Political science
22
900 - History & geography
7
327 - International relations
6
341 - Law of nations
5
300 - Social sciences
3
304 - Factors affecting social behavior
3
410 - Linguistics
3
519 - Probabilities & applied mathematics
3
621 - Applied physics
3
005 - Computer programming, programs & data
2
299 - Religions not provided for elsewhere
2
301 - Sociology & anthropology
2
332 - Financial economics
2
345 - Criminal law
2
347 - Civil procedure & courts
2
350 - Public administration & military science
2
500 - Natural sciences & mathematics
2
614 - Incidence & prevention of disease
2
629 - Other branches of engineering
2
650 - Management & auxiliary services
2
658 - General management
2
910 - Geography & travel
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
150 - Psychology
1
170 - Ethics
1
200 - Religion
1
303 - Social processes
1
306 - Culture & institutions
1
325 - International migration & colonization
1
331 - Labor economics
1
333 - Economics of land & energy
1
335 - Socialism & related systems
1
336 - Public finance
1
338 - Production
1
342 - Constitutional & administrative law
1
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
1
346 - Private law
1
349 - Law of specific jurisdictions & areas
1
351 - Public administration
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
384 - Communications; telecommunication
1
491 - East Indo-European & Celtic languages
1
501 - Philosophy & theory
1
510 - Mathematics
1
more ...