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Dewey Decimal Classification (DDC) : 400

First Summary (The Ten Main Classes)

000 : Computers, information, & general works
100 : Philosophy & psychology
200 : Religion
300 : Social sciences
400 : Language
500 : Science
600 : Technology
700 : Arts & recreation
800 : Literature
900 : History & geography

Second Summary (The Hundred Divisions)

400 : Language
410 : Linguistics
420 : English & Old English Languages
430 : German & related languages
440 : French & related languages
450 : Italian, Romanian & related languages
460 : Spanish & Portuguese languages
470 : Latin & Italic languages
480 : Classical & modern Greek languages
490 : Other languages


Third Summary (The Thousand Sections)

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 : Kinds of persons treatment
409 : Geographic & persons treatment