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- Dewey Decimal Classification (DDC) (44199)
- 600 Technology (Applied sciences) (44199)
- 608 Patents (1)
- 610 Medicine and health (2146)
- 612 Human Physiology (137)
- 616 Diseases (1193)
- 621 Applied physics (3927)
- 624 Civil engineering (1299)
- 627 Hydraulic engineering (1029)
- 628 Sanitary engineering (473)
- 636 Animal husbandry (4492)
- 638 Insect culture (64)
- 641 Food and drink (646)
- 648 Housekeeping (2)
- 651 Office services (20)
- 657 Accounting (2826)
- 658 General management (10637)
- 664 Food technology (630)
- 669 Metallurgy (37)
- 670 Manufacturing (763)
- 677 Textiles (8)
- 696 Utilities (3)
- 600 Technology (Applied sciences) (44199)
Number of items at this level: 0.