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MDS Spectrum
0XX: Information
1XX: Philosophy and Psychology
2XX: Religions
3XX: Social sciences
4XX: Language
5XX: Natural sciences and mathematics
6XX: Technology and Application of Knowledge
7XX: Arts and Recreation
8XX: Literature
9XX: History and Geography
The MDS Spectrum is a representation of a library based on the distribution of books within MDS classes. Each color represents a set of books within a top-level class. MDS, The Melville Decimal System, is a free version of OCLC's Dewey Decimal System®.
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