Two-digit System
11 Logic
12 Mathematics
21 Astronomy, Astrophysics
22 Physics
23 Chemistry
24 Life Sciences
25 Earth and space science
31 Agricultural Sciences
32 Medical Sciences
33 Technological Sciences
51 Anthropology
52 Demography
53 Economic Sciences
54 Geography
55 History
56 Juridical Science and Law
57 Linguistics
58 Pedagogy
59 Political Science
61 Psychology
62 Sciences of Arts and Letters
63 Sociology
71 Ethics
72 Philosophy
Read more about this topic: UNESCO Nomenclature
Famous quotes containing the word system:
“Society cannot share a common communication system so long as it is split into warring factions.”
—Bertolt Brecht (1898–1956)
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