| 
   
[Updated: 2016-Sep-29] 
  
    
      
        
          | 500 | 
          Technology. Engineering | 
         
        
          | 501 | 
          Basic engineering | 
         
        
          | 502 | 
          History of technology | 
         
        
          | 503 | 
          Reference books | 
         
        
          | 504 | 
          Essays and lectures | 
         
        
          | 505 | 
          Serial publications | 
         
        
          | 506 | 
          Organizations | 
         
        
          | 507 | 
          Study and teaching | 
         
        
          | 508 | 
          Collected works. Collections | 
         
        
          | 509 | 
          Industries. Manufacturing industry | 
         
       
     | 
    
      
        
          | 510 | 
          Construction. Civil engineering | 
         
        
          | 511 | 
          Mechanics and materials | 
         
        
          | 512 | 
          Surveying | 
         
        
          | 513 | 
          Designs and executions | 
         
        
          | 514 | 
          Engineering of roads and highways | 
         
        
          | 515 | 
          Bridge engineering | 
         
        
          | 516 | 
          Railroad engineering | 
         
        
          | 517 | 
          Hydraulic engineering | 
         
        
          | 518 | 
          Sanitary and municipal engineering | 
         
        
          | 519 | 
          Environmental engineering. Pollution | 
         
       
     | 
   
  
    
      
        
          | 520 | 
          Architecture. Building | 
         
        
          | 521 | 
          Japanese architecture | 
         
        
          | 522 | 
          Oriental architecture | 
         
        
          | 523 | 
          Occidental architecture. Others | 
         
        
          | 524 | 
          Construction | 
         
        
          | 525 | 
          Planning. Design. Practices | 
         
                  | 526 | 
          Specific buildings | 
         
        
          | 527 | 
           Residential buildings | 
         
        
          | 528 | 
          Building utilities | 
         
        
          | 529 | 
          Architectural design and decoration | 
         
       
     | 
    
      
        
          | 530 | 
          Mechanical engineering | 
         
        
          | 531 | 
          Mechanics, materials and design | 
         
        
          | 532 | 
          Machine-shop practice. Machine tools | 
         
        
          | 533 | 
          Heat engines | 
         
        
          | 534 | 
          Hydraulic and pneumatic machinery | 
         
        
          | 535 | 
          Precision and optical instruments | 
         
        
          | 536 | 
          Transportation engineering | 
         
        
          | 537 | 
          Automobile engineering | 
                 
          | 538 | 
          Aerouautical engineering. Space engineering | 
         
        
          | 539 | 
          Nuclear engineering | 
         
       
     | 
   
  
    
      
        
          | 540 | 
          Electrical engineering | 
         
        
          | 541 | 
          Electric circuits, measurements and materials | 
         
        
          | 542 | 
          Electrical machinery | 
         
        
          | 543 | 
          Generation of electric power | 
         
        
          | 544 | 
          Transmission. Transformation. Distribution | 
         
        
          | 545 | 
          Electric lighting and heating | 
         
        
          | 546 | 
          Electric railroads | 
         
        
          | 547 | 
          Communication engineering | 
         
        
          | 548 | 
          Information engineering | 
         
        
          | 549 | 
          Electronic engineering | 
         
       
     | 
    
      
        
          | 550 | 
          Maritime engineering | 
         
        
          | 551 | 
          Theories of shipbuilding | 
         
        
          | 552 | 
          Hull construction. Materials of hull | 
         
        
          | 553 | 
          Equipment and outfit of ships | 
         
        
          | 554 | 
          Marine engineering | 
         
        
          | 555 | 
          Refitment of ships. Maintenance | 
         
        
          | 556 | 
          Specific ships and boats | 
         
        
          | 557 | 
          Navigation | 
         
        
          | 558 | 
          Sea development | 
         
        
          | 559 | 
          Weapons. Military engineering | 
         
       
     | 
   
  
    
      
        
          | 560 | 
          Metal and mining engineering | 
         
        
          | 561 | 
          Exploitation. Ore dressing | 
         
        
          | 562 | 
          Mining of specific metals | 
         
        
          | 563 | 
          Metallurgy and alloys. Metallography | 
         
        
          | 564 | 
           Ferrous metals | 
         
        
          | 565 | 
           Nonferrous metals | 
         
        
          | 566 | 
           Metallurgical technology | 
         
        
          | 567 | 
          Coal mining | 
         
        
          | 568 | 
          Petroleum mining | 
         
        
          | 569 | 
          Non-metalic mining | 
         
       
     | 
    
      
        
          | 570 | 
          Chemical technology | 
         
        
          | 571 | 
          Chemical engineering | 
         
        
          | 572 | 
          Industrial electrochemistry | 
         
        
          | 573 | 
          Ceramic technology | 
         
        
          | 574 | 
          Industrial chemicals | 
         
        
          | 575 | 
          Fuels and explosives | 
         
        
          | 576 | 
          Oils and fats | 
         
        
          | 577 | 
          Dyes | 
         
        
          | 578 | 
          Polymers. Plastics. Cellulose | 
         
        
          | 579 | 
          Other chemical technologies | 
         
       
     | 
   
  
    
      
        
          | 580 | 
          Manufactures | 
         
        
          | 581 | 
          Metal goods | 
         
        
          | 582 | 
          Business machines. Household appliances. Musical instrument | 
         
        
          | 583 | 
          Woodworking | 
         
        
          | 584 | 
          Leather and fur goods | 
         
        
          | 585 | 
          Pulp and paper industries | 
         
        
          | 586 | 
          Textile industry | 
         
        
          | 587 | 
          Dyeing | 
         
        
          | 588 | 
          Food technology | 
         
        
          | 589 | 
          Other miscellaneous manufactures | 
         
       
     | 
    
      
        
          | 590 | 
          Domestic arts and sciences | 
         
        
          | 591 | 
          Domestic economy and management | 
         
        
          | 592 | 
          Sciences and technology in household | 
         
        
          | 593 | 
          Clothing. Sewing | 
                 
          | 594 | 
          Handicrafts | 
         
        
          | 595 | 
          Beauty culture | 
         
        
          | 596 | 
          Food. Cookery | 
         
        
          | 597 | 
          Household utilities | 
         
        
          | 598 | 
          Domestic health | 
         
        
          | 599 | 
          Care of children | 
         
       
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