300	Social sciences
301	Sociology & anthropology
302	Social interaction
303	Social processes
304	Factors affecting social behavior
305	Social groups
306	Culture & institutions
307	Communities
308	Not assigned or no longer used
309	Not assigned or no longer used
310	General statistics
311	Not assigned or no longer used
312	Not assigned or no longer used
313	Not assigned or no longer used
314	General statistics Of Europe
315	General statistics Of Asia
316	General statistics Of Africa
317	General statistics Of North America
318	General statistics Of South America
319	General statistics Of other parts of the world
320	Political science
321	Systems of governments & states
322	Relation of state to organized groups
323	Civil & political rights
324	The political process
325	International migration & colonization
326	Slavery & emancipation
327	International relations
328	The legislative process
329	Not assigned or no longer used
330	Economics
331	Labor economics
332	Financial economics
333	Land economics
334	Cooperatives
335	Socialism & related systems
336	Public finance
337	International economics
338	Production
339	Macroeconomics & related topics
340	Law
341	International law
342	Constitutional & administrative law
343	Military, tax, trade, industrial law
344	Social, labor, welfare, & related law
345	Criminal law
346	Private law
347	Civil procedure & courts
348	Law (Statutes), regulations, cases
349	Law of specific jurisdictions & areas
350	Public administration
351	Of central governments
352	Of local governments
353	of U.S. federal & state governments
354	Of specific central governments
355	Military science
356	Foot forces & warfare
357	Mounted forces & warfare
358	Other specialized forces & services
359	Sea (Naval) forces & warfare
360	Social services; association
361	General social problems & services
362	Social welfare problems & services
363	Other social problems & services
364	Criminology
365	Penal & related institutions
366	Association
367	General clubs
368	Insurance
369	Miscellaneous kinds of associations
370	Education
371	School management; special education
372	Elementary education
373	Secondary education
374	Adult education
375	Curriculums
376	Education of women
377	Schools & religion
378	Higher education
379	Government regulation, control, support
380	Commerce, communications, transport
381	Internal commerce (Domestic trade)
382	International commerce (Foreign trade)
383	Postal communication
384	Communications Telecommunication
385	Railroad transportation
386	Inland waterway & ferry transportation
387	Water, air, space transportation
388	Transportation Ground transportation
389	Metrology & standardization
390	Customs, etiquette, folklore
391	Costume & personal appearance
392	Customs of life cycle & domestic life
393	Death customs
394	General customs
395	Etiquette (Manners)
396	Not assigned or no longer used
397	Not assigned or no longer used
398	Folklore
399	Customs of war & diplomacy

Source