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 Associations

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