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



400 Language
401 Philosophy & theory
402 Miscellany
403 Dictionaries & encyclopedias
404 Special topics
405 Serial publications
406 Organizations & management
407 Education, research, related topics
408 With respect to kinds of persons
409 Geographical & persons treatment

410 Linguistics
411 Writing systems
412 Etymology
413 Dictionaries
414 Phonology
415 Structural systems (Grammar)
416 Not assigned or no longer used
417 Dialectology & historical linguistics
418 Standard usage Applied linguistics
419 Verbal language not spoken or written

420 English & Old English
421 English writing system & phonology
422 English etymology
423 English dictionaries
424 Not assigned or no longer used
425 English grammar
426 Not assigned or no longer used
427 English language variations
428 Standard English usage
429 Old English (Anglo-Saxon)

430 Germanic languages German
431 German writing system & phonology
432 German etymology
433 German dictionaries
434 Not assigned or no longer used
435 German grammar
436 Not assigned or no longer used
437 German language variations
438 Standard German usage
439 Other Germanic languages

440 Romance languages French
441 French writing system & phonology
442 French etymology
443 French dictionaries
444 Not assigned or no longer used
445 French grammar
446 Not assigned or no longer used
447 French language variations
448 Standard French usage
449 Provencal & Catalan

450 Italian, Romanian, Rhaeto-Romantic
451 Italian writing system & phonology
452 Italian etymology
453 Italian dictionaries
454 Not assigned or no longer used
455 Italian grammar
456 Not assigned or no longer used
457 Italian language variations
458 Standard Italian usage
459 Romanian & Rhaeto-Romanic

460 Spanish & Portugese languages
461 Spanish writing system & phonology
462 Spanish etymology
463 Spanish dictionaries
464 Not assigned or no longer used
465 Spanish grammar
466 Not assigned or no longer used
467 Spanish language variations
468 Standard Spanish usage
469 Portugese

470 Italic Latin
471 Classical Latin writing & phonology
472 Classical Latin etymology & phonology
473 Classical Latin dictionaries
474 Not assigned or no longer used
475 Classical Latin grammar
476 Not assigned or no longer used
477 Old, Postclassical, Vulgar Latin
478 Classical Latin usage
479 Other Italic languages

480 Hellenic languages Classical Greek
481 Classical Greek writing & phonology
482 Classical Greek etymology
483 Classical Greek dictionaries
484 Not assigned or no longer used
485 Classical Greek grammar
486 Not assigned or no longer used
487 Preclassical & postclassical Greek
488 Classical Greek usage
489 Other Hellenic languages

490 Other languages
491 East Indo-European & Celtic languages
492 Afro-Asiatic languages Semitic
493 Non-Semitic Afro-Asiatic languages
494 Ural-Altaic, Paleosiberian, Dravidian
495 Languages of East & Southeast Asia
496 African languages
497 North American native languages
498 South American native languages
499 Miscellaneous languages

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