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Dewey Decimal Classification (DDC) : 670

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)

600 : Technology
610 : Medicine & health
620 : Engineering
630 : Agriculture
640 : Home & family management
650 : Management & public relations
660 : Chemical engineering
670 : Manufacturing
680 : Manufacture for specific uses
690 : Building & construction


Third Summary (The Thousand Sections)

670 : Manufacturing
671 : Metalworking & primary metal products
672 : Iron, steel & other iron alloys
673 : Nonferrous metals
674 : Lumber processing, wood products & cork
675 : Leather & fur processing
676 : Pulp & paper technology
677 : Textiles
678 : Elastomers & elastomer products
679 : Other products of specific materials