related subjects 579 Natural history of microorganisms, fungi, algae 580 Plants 580 Plants 581 Specific topics in natural history of plants 582 Plants noted for specific vegetative characteristics and flowers 583 Magnoliopsida (Dicotyledones) 584 Liliopsida (Monocotyledones) 585 Pinophyta (Gymnosperms) 586 Cryptogamia (Seedless plants) 587 Pteridophyta 588 Bryophyta 589 No longer used—formerly Forestry 590 Animals (Zoology) 590 Animals 591 Specific topics in natural history of animals 592 Invertebrates 593 Miscellaneous marine and seashore invertebrates 594 Mollusca and Molluscoidea 595 Arthropoda 596 Chordata 597 Cold-blooded vertebrates 598 Aves (Birds) 599 Mammalia (Mammals) Class 600 – Technology 600 Technology 600 Technology (Applied sciences) 601 Philosophy and theory 602 Miscellany 603 Dictionaries, encyclopedias, concordances 604 Technical drawing, hazardous materials technology; groups of people 605 Serial publications 606 Organizations 607 Education, research, related topics 608 Patents 609 History, geographic treatment, biography 610 Medicine and health 610 Medicine and health 611 Human anatomy, cytology, histology 612 Human physiology 613 Personal health and safety 614 Forensic medicine; incidence of injuries, wounds, disease; public preventive medicine 615 Pharmacology and therapeutics 616 Diseases 617 Surgery, regional medicine, dentistry, ophthalmology, otology, audiology 618 Gynecology, obstetrics, pediatrics, geriatrics 619 No longer used—formerly Experimental medicine 620 Engineering 620 Engineering and applied operations 621 Applied physics 622 Mining and related operations 623 Military and nautical engineering 624 Civil engineering 625 Engineering of railroads, roads 626 Not assigned or no longer used 627 Hydraulic engineering 628 Sanitary engineering 629 Other branches of engineering 630 Agriculture 630 Agriculture and related technologies 631 Specific techniques; apparatus, equipment, materials 632 Plant injuries, diseases, pests 633 Field and plantation crops 634 Orchards, fruits, forestry 635 Garden crops (Horticulture) 636 Animal husbandry 637 Processing dairy and related products 638 Insect culture 639 Hunting, fishing, conservation, related technologies 640 Home and family management 640 Home and family management 641 Food and drink 642 Meals and table service 643 Housing and household equipment 644 Household utilities 645 Household furnishings 646 Sewing, clothing, management of personal and family life 647 Management of public households (Institutional housekeeping) 648 Housekeeping 649 Child rearing; home care of people with disabilities and illnesses 650 Management and public relations 650 Management and auxiliary services 651 Office services 652 Processes of written communication 653 Shorthand 654–656 Not assigned or no longer used 657 Accounting 658 General management 659 Advertising and public relations 660 Chemical engineering 660 Chemical engineering and related technologies 661 Technology of industrial chemicals 662 Technology