Dewey Decimal System: 21st edition
000 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900



300 Social sciences
301Sociology & 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