First Summary (The Ten Main Classes) | |||||||||||||||||||||
| 000 : Computers, information, & general works | |||||||||||||||||||||
| 100 : Philosophy & psychology | |||||||||||||||||||||
| 200 : Religion | |||||||||||||||||||||
| 300 : Social sciences | |||||||||||||||||||||
| 400 : Language | |||||||||||||||||||||
| 500 : Science | |||||||||||||||||||||
| 600 : Technology | |||||||||||||||||||||
| 700 : Arts & recreation | |||||||||||||||||||||
| 800 : Literature | |||||||||||||||||||||
| 900 : History & geography | |||||||||||||||||||||
Second Summary (The Hundred Divisions)
000 : Computer science, knowledge & systems
| 010 : Bibliographies
| 020 : Library & information science
| 030 : Encyclopedias & books of facts
| 040 : [Unassigned]
| 050 : Magazines, journals & serials
| 060 : Associations, organizations & museums
| 070 : News media, journalism & publishing
| 080 : Quotations
| 090 : Manuscripts & rare books
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| 090 : Manuscripts & rare books | 091 : Manuscripts | 092 : Block books | 093 : Incunabula | 094 : Printed books | 095 : Books notable for bindings | 096 : Books notable for illustrations | 097 : Books notable for ownership or origin | 098 : Prohibited works, forgeries & hoaxes | 099 : Books notable for format |