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Dewey Decimal Classification (DDC) : 390

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)

300 : Social sciences, sociology & anthropology
310 : Statistics
320 : Political science
330 : Economics
340 : Law
350 : Public administration & military science
360 : Social problems & social services
370 : Education
380 : Commerce, communications & transportation
390 : Customs, etiquette & folklore


Third Summary (The Thousand Sections)

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 : [Unassigned]
397 : [Unassigned]
398 : Folklore
399 : Customs of war & diplomacy