0 General works
00 General works
01 Libraries. Library and information sciences
02 Books. Bibliography
03 General encyclopedias
04 General collected essays
05 General serial publications
06 General societies
07 Journalism. Newspapers
08 General collections
09 Rare books. Local collections. Special collections
1 Philosophy
10 Philosophy
11 Special treatises on philosophy
12 Oriental thought
13 Western philosophy
14 Psychology
15 Ethics. Morals
16 Religion
17 Shintô
18 Buddhism
19 Christianity
2 General history
20 General history
21 General history of Nippon
22 General history of Asia
23 General history of Europe
24 General history of Africa
25 General history of North America
26 General history of South America
27 General history of Oceania. General history of Polar regions
28 General biography
29 General geography. Description and travel
3 Social sciences
30 Social sciences
31 Political science
32 Law
33 Economics
34 Public finance
35 Statistics
36 Society
37 Education
38 Customs, folklore and ethnology
39 National defence. Military science
4 Natural sciences
40 Natural sciences
41 Mathematics
42 Physics
43 Chemistry
44 Astronomy. Space sciences
45 Earth sciences
46 Biology
47 Botany
48 Zoology
49 Medical sciences
5 Technology. Engineering
50 Technology. Engineering
51 Construction. Civil engineering
52 Architecture. Building
53 Mechanical engineering
54 Electrical engineering
55 Maritime engineering
56 Metal and mining engineering
57 Chemical technology
58 Manufactures
59 Domestic arts and sciences
6 Industry and commerce
60 Industry and commerce
61 Agriculture
62 Horticulture
63 Sericulture. Silk industry
64 Animal husbandry
65 Forestry
66 Fishing industry. Fisheries
67 Commerce
68 Transportation services
69 Communication services
7 The arts. Fine arts
70 The arts. Fine arts
71 Sculpture. Plastic arts
72 Painting. Pictorial arts
73 Engraving
74 Photography and photographs
75 Industrial arts
76 Music
77 Theater
78 Sports and physical training
79 Accomplishments and amusements
8 Language
80 Language
81 Nipponese
82 Chinese
83 English
84 German
85 French
86 Spanish
87 Italian
88 Russian
89 Other languages
9 Literature
90 Literature
91 Nipponese literature
92 Chinese literature
93 English and American literature
94 German literature
95 French literature
96 Spanish literature
97 Italian literature
98 Russian literature
99 Literatures of other languages