Classification
338 - Production
16
363 - Other social problems & services
12
355 - Military science
11
362 - Social welfare problems & services
10
305 - Social groups
7
333 - Economics of land & energy
7
306 - Culture & institutions
6
331 - Labor economics
5
371 - Schools & their activities; special education
5
304 - Factors affecting social behavior
3
327 - International relations
3
337 - International economics
3
340 - Law
3
382 - International commerce
3
307 - Communities
2
320 - Political science
2
321 - Systems of governments & states
2
324 - The political process
2
332 - Financial economics
2
346 - Private law
2
347 - Civil procedure & courts
2
352 - General considerations of public administration
2
358 - Air & other specialized forces
2
388 - Transportation; ground transportation
2
615 - Pharmacology & therapeutics
2
621 - Applied physics
2
622 - Mining & related operations
2
972 - Middle America; Mexico
2
979 - Great Basin & Pacific Slope region
2
005 - Computer programming, programs & data
1
100 - Philosophy & psychology
1
110 - Metaphysics
1
121 - Epistemology
1
150 - Psychology
1
171 - Ethical systems
1
231 - God
1
266 - Missions
1
296 - Judaism
1
300 - Social sciences
1
302 - Social interaction
1
303 - Social processes
1
322 - Relation of state to organized groups
1
330 - Economics
1
335 - Socialism & related systems
1
339 - Macroeconomics & related topics
1
344 - Labor, social, education & cultural law
1
349 - Law of specific jurisdictions & areas
1
351 - Public administration
1
353 - Specific fields of public administration
1
365 - Penal & related institutions
1
more ...