Dewey Decimal Classification (DDC)
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47
terms
Occitan & Catalan
Occitan & Catalan literatures
Occupational ethics
Office services
Old English (Anglo-Saxon)
Old English (Anglo-Saxon)
Old Testament (Tanakh)
Old, postclassical & Vulgar Latin
Ontology
Orchards, fruits & forestry
Organic chemistry
Organizations
Organizations & management
Organizations & management
Organizations & management
Organizations & management
Organizations & management
Organizations & management
Organizations in British Isles; in England
Organizations in central Europe; in Germany
Organizations in eastern Europe; in Russia
Organizations in France & Monaco
Organizations in Iberian Peninsula & adjacent islands
Organizations in Italy & adjacent islands
Organizations in North America
Organizations in other geographic areas
Origin & destiny of individual souls
Other branches of engineering
Other denominations & sects
Other ethical norms
Other final products & packaging
Other Germanic languages
Other Germanic literatures
Other Hellenic languages
Other Italic languages
Other languages
Other languages
Other literatures
Other parts of ancient world to ca. 640
Other parts of Europe
Other parts of Pacific; Polynesia
Other philosophical systems
Other products of specific materials
Other religions
Other religions
Other social problems & services
Other subjects