Main Categories List
- 600 Technology ([Applied sciences]?)
- 601 Philosophy & theory
- 602 Miscellany
- 603 Dictionaries & encyclopedias
- 604 Special topics
- 605 Serial publications
- 606 Organizations
- 607 Education, research, related topics
- 608 Invention & patents
- 609 Historical, areas, persons treatment
- 610 [Medical sciences]? Medicine
- 611 Human anatomy, [Human cytology]?,[Human histology]?
- 612 [Human physiology]?
- 613 Promotion of health?
- 614 Incidence & prevention of disease
- 615 Pharmacology & theraputics
- 616 Diseases?
- 617 Surgery? & related medical specialities
- 618 Gynecology? & other medical specialities
- 619 [Experimental medicine]?
- 620 Engineering & allied operations
- 621 [Applied physics]?
- 622 Mining & related operations
- 623 [Military engineering]? & [nautical engineering]?
- 624 Civil engineering
- 625 Engineering of railroads, roads
- 626
- 627 [Hydraulic engineering]?
- 628 [Sanitary engineering]? & [municipal engineering]?
- 629 Other branches of engineering
- 630 Agriculture
- 631 Techniques, equipment, materials
- 632 [Plant injuries]?, [Plant diseases]?, [Plant pests]?
- 633 Field & plantation crops
- 634 Orchard?s, fruits, forestry?
- 635 Garden? crops (Horticulture?)
- 636 [Animal husbandry]?
- 637 Processing dairy? & related products
- 638 [Insect culture]?
- 639 Hunting?, fishing?, conservation?
- 640 [Home economics]? & family living
- 641 Food & drink
- 642 Meals & table service
- 643 Housing & household equipment
- 644 [Household utilities]?
- 645 [Household furnishings]?
- 646 Sewing?, clothing?, personal living
- 647 Management of public households
- 648 Housekeeping?
- 649 [Child rearing]? & home care of sick
- 650 Management & auxiliary services
- 651 [Office services]?
- 652 Processes of written communication
- 653 Shorthand?
- 654
- 655
- 656
- 657 Accounting
- 658 General management
- 659 Advertising & public relations
- 660 Chemical engineering
- 661 Industrial chemicals technology
- 662 Explosives?, fuels technology
- 663 Beverage technology
- 664 Food technology
- 665 Industrial oils, fats, wax?es, gases
- 666 Ceramic? & allied technologies
- 667 Cleaning, color, related technologies
- 668 Technology of other organic products
- 669 Metallurgy
- 670 Manufacturing?
- 671 Metalworking? & metal products
- 672 Iron, steel, other iron alloys
- 673 [Nonferrous metals]?
- 674 Lumber? processing, wood products, cork?
- 675 [Leather processing]? & [fur processing]?
- 676 Pulp & paper technology
- 677 Textiles?
- 678 Elastomer?s & elastomer products
- 679 Other products of specific materials
- 680 Manufacture for specific uses
- 681 Precision instruments & other devices
- 682 Small forge work (Blacksmithing?)
- 683 Hardware & household appliances
- 684 Furnishings & home workshops
- 685 Leather, fur?, related products
- 686 Printing? & related activities
- 687 Clothing?
- 688 Other final products & packaging
- 689
- 690 Building?s
- 691 Building materials
- 692 Auxiliary construction practices
- 693 Specific materials & purposes
- 694 Wood construction (Carpentry?)
- 695 Roof covering
- 696 Utilities?
- 697 Heating, ventilating, air-conditioning
- 698 Detail finishing
- 699
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Dewey Decimal System/Technology