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The `!Nippon Decimal Classification`! (`F33f`_`[Japanese`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Japanese_language]`_`f: 日本十進分類法, `F33f`_`[Hepburn`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Hepburn_romanization]`_`f: `*Nihonjisshinbunruihō`*) (`!NDC`!, also called the `!Nippon Decimal System`!) is a system of `F33f`_`[library classification`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Library_classification]`_`f developed for mainly Japanese-language books maintained and revised by the `F33f`_`[Japan Library Association`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Japan_Library_Association]`_`f since 1948. Originally developed in 1929 by Kiyoshi Mori, the 10th and latest edition of this system was published in 2014. The decimal notation system is similar to the `F33f`_`[Dewey Decimal System`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Dewey_Decimal_Classification]`_`f, and the order of main classes is inspired from the `F33f`_`[Cutter Expansive Classification`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Cutter_Expansive_Classification]`_`f. The system is based upon using a three digit number to classify subjects, where more digits can be added if necessary and a decimal point is used to separate the third and fourth digit. The first division level is called a class, the second level is called a division, and the third level is called a section. Each '1-9' digit is used to represent a specific category, with the digit '0' being used to represent general works.
>>Contents
• `F0af`_`[Classes`#classes]`_`f
• `F0af`_`[000`#000]`_`f
• `F0af`_`[100`#100]`_`f
• `F0af`_`[200`#200]`_`f
• `F0af`_`[300`#300]`_`f
• `F0af`_`[400`#400]`_`f
• `F0af`_`[500`#500]`_`f
• `F0af`_`[600`#600]`_`f
• `F0af`_`[700`#700]`_`f
• `F0af`_`[800`#800]`_`f
• `F0af`_`[900`#900]`_`f
• `F0af`_`[References`#references]`_`f
• `F0af`_`[External links`#external-links]`_`f
-─
>>Classes
>>>000
The General category contains books that contain general information, rather than information about specific topics. The sub-categories of the General category are:
• 010 Libraries, `F33f`_`[Library & information science`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Library_and_information_science]`_`f
• 020 Books, `F33f`_`[Bibliography`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Bibliography]`_`f
• 030 Encyclopaedias
• 040 General collected essays
• 050 General `F33f`_`[serial publications`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Periodical_literature]`_`f
• 060 General societies
• 070 Journalism, Newspapers
• 080 General collections
• 090 `F33f`_`[Rare books`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Rare_books]`_`f, Local collections, `F33f`_`[Special collections`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Special_collections]`_`f
>>>100
The Philosophy category contains books that contain information regarding philosophy, religion, and psychology. The sub-categories of the Philosophy category are:
• 110 Special treatises on philosophy
• 120 `F33f`_`[Oriental philosophy`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Oriental_philosophy]`_`f
• 130 `F33f`_`[Western philosophy`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Western_philosophy]`_`f
• 140 `F33f`_`[Psychology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Psychology]`_`f
• 150 Ethics & morals
• 160 Religion
• 170 `F33f`_`[Shinto`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Shinto]`_`f
• 180 `F33f`_`[Buddhism`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Buddhism]`_`f
• 190 Christianity
>>>200
The History category contains books that contain information regarding local and foreign history. The sub-categories of the History category are:
• 210 `F33f`_`[History of Japan`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_Japan]`_`f
• 220 `F33f`_`[History of Asia`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_Asia]`_`f
• 230 `F33f`_`[History of Europe`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_Europe]`_`f
• 240 `F33f`_`[History of Africa`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_Africa]`_`f
• 250 `F33f`_`[History of North America`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_North_America]`_`f
• 260 `F33f`_`[History of South America`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_South_America]`_`f
• 270 `F33f`_`[History of Oceania`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=History_of_Oceania]`_`f & `F33f`_`[Polar region`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Polar_regions]`_`f
• 280 Biography
• 290 `F33f`_`[Geography`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Geography]`_`f, `F33f`_`[Topography`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Topography]`_`f, Travel
>>>300
The Social Sciences category contains books that contain information regarding modern day society, such as government systems and cultural traditions. The sub-categories of the Social Sciences category are:
• 310 Politics
• 320 Law
• 330 Economics
• 340 Finance
• 350 Statistics
• 360 Sociology
• 370 Education
• 380 Customs, `F33f`_`[Folklore`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Folklore]`_`f, `F33f`_`[Ethnology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Ethnology]`_`f
• 390 National defence, `F33f`_`[Military science`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Military_science]`_`f
>>>400
The Natural Sciences category contains books that contain information regarding the natural world, such as plants, animals, and natural laws, such as math and physics. The sub-categories of the Natural Sciences category are:
• 410 Mathematics
• 420 `F33f`_`[Physics`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Physics]`_`f
• 430 `F33f`_`[Chemistry`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Chemistry]`_`f
• 440 `F33f`_`[Astronomy`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Astronomy]`_`f, `F33f`_`[Space science`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Space_science]`_`f
• 450 `F33f`_`[Earth science`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Earth_science]`_`f
• 460 `F33f`_`[Biology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Biology]`_`f
• 470 `F33f`_`[Botany`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Botany]`_`f
• 480 `F33f`_`[Zoology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Zoology]`_`f
• 490 Medicine, `F33f`_`[Pharmacology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Pharmacology]`_`f
>>>500
The Technology & Engineering category contains books that contain information regarding man-made scientific achievements. The sub-categories of the Technology & Engineering category are:
• 510 Construction, Civil engineering
• 520 Architecture
• 530 Mechanical engineering, `F33f`_`[Nuclear engineering`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Nuclear_engineering]`_`f
• 540 `F33f`_`[Electrical`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Electrical_engineering]`_`f & `F33f`_`[Electronic engineering`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Electronic_engineering]`_`f
• 550 Maritime & `F33f`_`[Naval engineering`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Naval_engineer]`_`f
• 560 Metal & `F33f`_`[Mining engineering`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Mining_engineering]`_`f
• 570 `F33f`_`[Chemical technology`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Chemical_technology]`_`f
• 580 Manufacturing
• 590 `F33f`_`[Domestic arts and sciences`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Domestic_science]`_`f
>>>600
The Industry and Commerce category contains books that contain information regarding business, products, transportation systems, and money. The sub-categories of the Industry and Commerce category are:
• 610 Agriculture
• 620 Horticulture
• 630 `F33f`_`[Silk industry`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Sericulture]`_`f
• 640 `F33f`_`[Animal husbandry`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Animal_husbandry]`_`f
• 650 `F33f`_`[Forestry`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Forestry]`_`f
• 660 Fishing
• 670 Commerce
• 680 Transportation & Traffic
• 690 Communications
>>>700
The Arts category contains books that contain information regarding various art forms, such as paintings, writing, and music. The sub-categories of the Arts category are:
• 710 `F33f`_`[Plastic arts`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Plastic_arts]`_`f (sculpture)
• 720 Painting & `F33f`_`[Calligraphy`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Calligraphy]`_`f
• 730 `F33f`_`[Engraving`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Engraving]`_`f
• 740 Photography & Printing
• 750 `F33f`_`[Craft`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Craft]`_`f
• 760 Music & Dance
• 770 Theatre, Motion Pictures
• 780 `F33f`_`[Sports`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Sports]`_`f, `F33f`_`[Physical Education`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Physical_Education]`_`f
• 790 `F33f`_`[Recreation`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Recreation]`_`f, Amusements
>>>800
The Language category contains books that contain information regarding various languages spoken around the world. The sub-categories of the Language category are:
• 810 Japanese
• 820 Chinese
• 830 English
• 840 German
• 850 French
• 860 Spanish
• 870 Italian
• 880 Russian
• 890 Other languages
>>>900
The Literature category contains books with fictional content, such as romance novels and adventure stories. The sub-categories of the Literature category are:
• 910 `F33f`_`[Japanese literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Japanese_literature]`_`f
• 920 `F33f`_`[Chinese literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Chinese_literature]`_`f
• 930 English & `F33f`_`[American literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=American_literature]`_`f
• 940 `F33f`_`[German literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=German_literature]`_`f
• 950 `F33f`_`[French literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=French_literature]`_`f
• 960 `F33f`_`[Spanish literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Spanish_literature]`_`f
• 970 `F33f`_`[Italian literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Italian_literature]`_`f
• 980 Russian & `F33f`_`[Soviet literature`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Soviet_literature]`_`f
• 990 Other language literature
>>References
>>External links
• Japan Library Association
• CyberLibrarian
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