DDC Thousands 600 - 699

600 Technology T3

601 Philosophy & theory T3 – TF5 ; T3 – TT

602 Miscellany

603 Dictionaries & encyclopedias T3 – T4b or T4a

604 Special topics

605 Serial publications T3 – T4h

606 Organizations PI4 (T3)

607 Education, research & related topics T3 – PE

608 Inventions & patents TI ; PI3 \ TI

609 Historical, geographic & persons treatment T3 – TF1 ; T3 – T7g ; T3 ^ I

610 Medicine & health TF (→H); H [as in 306.461]

611 Human anatomy, cytology & histology TF (BO (G) or BL →H)

612 Human physiology TF (BS →H)

613 Personal health & safety →ga HI

614 Incidence & prevention of disease →ga HD

615 Pharmacology & therapeutics TF (M → H)

616 Diseases HD

617 Surgery & related medical specialties →mb → H

618 Gynecology, obstetrics, pediatrics & geriatrics TF (→H) ^ SG1 →ar; TF (→H) ^ →ar; TF (→H) \ SA5; TF (→H) \ SA9;

619 [Unassigned]

620 Engineering & allied operations TF (T3)

621 Applied physics TF8b →

622 Mining & related operations EO9711

623 Military & nautical engineering TF (T3 \ PI5a); TF (T3 \ N3)

624 Civil engineering TF (T3 \ NB)

625 Engineering of railroads & roads TF (T3 \ NBd +a)

626 [Unassigned]

627 Hydraulic engineering TF (T3 \ N3→gm)

628 Sanitary & municipal engineering TF (T3 \ NB5g (→aw))

629 Other branches of engineering Specify

630 Agriculture & related technologies T3 \ EO91 [Note: DDC switches here from engineering to the techniques themselves. We should be able to move seamlessly between the two.]

631 Techniques, equipment & materials

632 Plant injuries, diseases & pests Fxxx – HD

633 Field & plantation crops EO95022 [cereals and pulses]

634 Orchards, fruits & forestry EO9101615

635 Garden crops (Horticulture) EO97011 [it seems to make sense here to refer to the service of horticulture rather than the variety of plants covered by this]

636 Animal husbandry FK5 \ EO9101 [Our general strategy is to use compounds with the goods being produced; there should be a link to the service of husbandry: animal husbandry has a precise entry as EO970121604 within a more general class of EO97012 Livestock services]

637 Processing dairy & related products →gt (FK5 →ab)

638 Insect culture EO9101019

639 Hunting, fishing & conservation → →gb FK5, EO9101017 [with link to EO9701015] ; Q(N)↑

640 Home & family management NB2 ←rs

641 Food & drink EO95 [food, beverage, and tobacco.]

642 Meals & table service →ia (→rp EO98515)

643 Housing & household equipment NB2; EO9 \ NB2

644 Household utilities NB2 u

645 Household furnishings NB2a

646 Sewing, clothing & personal living →gc EO9531

647 Management of public households NB2 (EI1h) ←rs

648 Housekeeping → QQ2 NB2 [cause clean house]

649 Child rearing & home care of persons →rs SA5 or SA9 or SD

650 Management & auxiliary services ←rs SO3

651 Office services EO98

652 Processes of written communication →rt T4 – PI3

653 Shorthand T4 (GA6b (QT1)) [fast writing text?]

654 [Unassigned]

655 [Unassigned]

656 [Unassigned]

657 Accounting SO1a

658 General management SO3

659 Advertising & public relations EI7b

660 Chemical engineering TF (T3 \ M)

661 Industrial chemicals M ^ →gc [chemicals associated with manufacture][Note that chemicals appear in many places in UNSPC]

662 Explosives, fuels & related products T3 (→ →ma QB1)

663 Beverage technology T3 \ EO9502

664 Food technology T3 \ EO95

665 Industrial oils, fats, waxes & gases EO91512

666 Ceramic & allied technologies T3 \ NMc

667 Cleaning, color & coating technologies T3 → QQ2 ; T3 → N7; T3 → N5y

668 Technology of other organic products T3 \ EO9yyy Specify

669 Metallurgy TF (T3 →gt MTM)

670 Manufacturing →gc EO9

671 Metalworking & primary metal products T3 →gt MTM; MTM (ME)

672 Iron, steel & other iron alloys MEFe ; →gt MEFe

673 Nonferrous metals MTM (MEFe)

674 Lumber processing, wood products & cork T3 \ EO9111216 →gc

675 Leather & fur processing T3 \ EO91116 →gc

676 Pulp & paper technology T3 \ EO9731116

677 Textiles EO97314 [The reference here is to the product rather than the technology.]

678 Elastomers & elastomer products MY3 N3i EO9

679 Other products of specific materials T3 \ EO9yyy Specify.

680 Manufacture for specific uses →gc EO9 \ Specify

681 Precision instruments & other devices EO9731716

682 Small forge work (Blacksmithing) TF (T3 →gt MTM) (QT2) [historic metallurgy?]

683 Hardware & household appliances EO9 (→ge) > NB2

684 Furnishings & home workshops NB2a [as in 645]; N (→gc EO9) > NB2

685 Leather, fur goods & related products EO91116

686 Printing & related activities EO9821215

687 Clothing & accessories EO9531

688 Other final products & packaging EO9yyy Specify

689 [Unassigned]

690 Buildings NB1

691 Building materials NM \ →gc NB1

692 Auxiliary construction practices T3 \ →gc NB1

693 Specific materials & purposes NMxxx \ →gc NB1

694 Wood construction & carpentry T3 \ →gc NB1 (NMw)

695 Roof covering NB1v

696 Utilities NB1u [similar to 644]

697 Heating, ventilating & air-conditioning NB1c,d,e

698 Detail finishing →gc (QA2) NB1

699 [Unassigned]