of explosives, fuels, related products 663 Beverage technology 664 Food technology 665 Technology of industrial oils, fats, waxes, gases 666 Ceramic and allied technologies 667 Cleaning, color, coating, related technologies 668 Technology of other organic products 669 Metallurgy 670 Manufacturing 670 Manufacturing 671 Metalworking processes and primary metal products 672 Iron, steel, other iron alloys 673 Nonferrous metals 674 Lumber processing, wood products, cork 675 Leather and fur processing 676 Pulp and paper technology 677 Textiles 678 Elastomers and elastomer products 679 Other products of specific kinds of materials 680 Manufacture for specific uses 680 Manufacture of products for specific uses 681 Precision instruments and other devices 682 Small forge work (Blacksmithing) 683 Hardware and household appliances 684 Furnishings and home workshops 685 Leather and fur goods, and related products 686 Printing and related activities 687 Clothing and accessories 688 Other final products, and packaging technology 689 Not assigned or no longer used 690 Construction of buildings 690 Construction of buildings 691 Building materials 692 Auxiliary construction practices 693 Construction in specific types of materials and for specific purposes 694 Wood construction 695 Roof covering 696 Utilities 697 Heating, ventilating, air-conditioning engineering 698 Detail finishing 699 Not assigned or no longer used Class 700 – Arts and recreation 700 Arts 700 The Arts 701 Philosophy and theory of fine and decorative arts 702 Miscellany of fine and decorative arts 703 Dictionaries, encyclopedias, concordances of fine and decorative arts 704 Special topics in fine and decorative arts 705 Serial publications of fine and decorative arts 706 Organizations and management of fine and decorative arts 707 Education, research, related topics of fine and decorative arts 708 Galleries, museums, private collections of fine and decorative arts 709 History, geographic treatment, biography 710 Area planning and landscape architecture 710 Area planning and landscape architecture 711 Area planning (Civic art) 712 Landscape architecture (Landscape design) 713 Landscape architecture of trafficways 714 Water features in landscape architecture 715 Woody plants in landscape architecture 716 Herbaceous plants in landscape architecture 717 Structures in landscape architecture 718 Landscape design of cemeteries 719 Natural landscapes 720 Architecture 720 Architecture 721 Architectural materials and structural elements 722 Architecture from earliest times to c. 300 723 Architecture from c. 300 to 1399 724 Architecture from 1400 725 Public structures 726 Buildings for religious and related purposes 727 Buildings for educational and research purposes 728 Residential and related buildings 729 Design and