| 500 Engineering. Technology | |
| 501 | Basic sciences in general | |
| 502 | History of engineering and technology | |
| 503 | Reference books | |
| 504 | Essays and lectures | |
| 505 | Serials. Periodicals | |
| 506 | Organizations and societies | |
| 507 | Study and teaching | |
| 508 | Collocted works | |
| 509 | Industry | |
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| 510 Civil engineering | |
| 511 | Civil engineering mechanics and materials | |
| 512 | Surveying | |
| 513 | Designs and executions | |
| 514 | Roads and highway engineering | |
| 515 | Bridge engineering | |
| 516 | Railway engineering | |
| 517 | River engineering | |
| 518 | Harbor engineering | |
| 519 | Sanitary engineering | |
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| 520 Architecture. Building | |
| 521 | Nippon styles | |
| 522 | Oriental architectures | |
| 523 | Occidental architectures | |
| 524 | Building construction | |
| 525 | Building designs. Execution of building works | |
| 526 | Specific types of buildings | |
| 527 | Residential buildings | |
| 528 | Building fittings | |
| 529 | Architectural decoration | |
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| 530 Mechanical engineering | |
| 531 | Mechanics, materials and design | |
| 532 | Workshop practice. Machine tools | |
| 533 | Heat engines | |
| 534 | Hydraulic and pneumatic machinery | |
| 535 | Precision instruments | |
| 536 | Locomotives and rolling stock | |
| 537 | Motor vehicle engineering | |
| 538 | Aircraft engineering. Aeronautics | |
| 539 | Nuclear engineering | |
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| 540 Electrical engineering
| | 541 | Circuits. Measurements. Materials | |
| 542 | Electric machinery and apparatus | |
| 543 | Production of electric power | |
| 544 | Electric transmission and distribution | |
| 545 | Electric lighting. Illumination engineering | |
| 546 | Electric traction and vehicles | |
| 547 | Electric communication | |
| 548 | Radio communication | |
| 549 | Electronics and electron tubes | |
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| 550 Naval engineering | |
| 551 | Theories of shipbuilding | |
| 552 | Hull construction | |
| 553 | Equipment and outfit | |
| 554 | Marine engineering | |
| 555 | Refitment of ships. Maintenance | |
| 556 | Merchant ships. Special vessels | |
| 557 | Warships | |
| 558 | Sea navigation | |
| 559 Ordnance. Military engineering | |
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| 560 Mining and metallurgy | |
| 561 | Mining engineering | |
| 562 | Mining of specific metals | |
| 563 | Metallurgy. Alloys | |
| 564 | Iron and steel | |
| 565 | Non-ferrous metallurgy | |
| 566 | Metallurgical technology | |
| 567 | Coal mining | |
| 568 | Petroleum mining | |
| 569 | Non-metallic mining | |
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| 570 Chemical technology | |
| 571 | Chemical engineering | |
| 572 | Industrial electrochemistry | |
| 573 | Ceramic industries. Silicate industries | |
| 574 | Industrial chemicals | |
| 575 | Fuel industries | |
| 576 | Oils and fats. Oil industries | |
| 577 | Dyestuffs | |
| 578 | High polymer chemical industries | |
| 579 | Other minor chemical industries | |
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| 580 Manufactures | |
| 581 | Articles made of metals | |
| 582 | Business, household and other minor | |
| 583 | Wood-using industries | |
| 584 | Leather and fur industries | |
| 585 | Pulp and paper industries | |
| 586 | Textile industry | |
| 587 | Dyeing | |
| 588 | Food technology | |
| 589 | Other industries | |
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| 590 Domestic science | |
| 591 | Domestic economy and management | |
| 592 | Domestic ohysics and chemistry | |
| 593 | Clothing. Sewing | |
| 594 | Handicrafts | |
| 595 | Beauty culture | |
| 596 | Food. Cookery | |
| 597 | Houses. Furniture | |
| 598 | Domestic health | |
| 599 | Care of children | |
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